diff --git a/keyboards/keychron/v4_max/ansi/ansi.c b/keyboards/keychron/v4_max/ansi/ansi.c
new file mode 100644
index 0000000000..285ab24c5c
--- /dev/null
+++ b/keyboards/keychron/v4_max/ansi/ansi.c
@@ -0,0 +1,124 @@
+/* Copyright 2024 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software : you can redistribute it and /or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.If not, see < http://www.gnu.org/licenses/>.
+ */
+
+#include "quantum.h"
+
+// clang-format off
+
+#ifdef RGB_MATRIX_ENABLE
+const snled27351_led_t g_snled27351_leds[RGB_MATRIX_LED_COUNT] = {
+/* Refer to SNLED27351 manual for these locations
+ * driver
+ * | R location
+ * | | G location
+ * | | | B location
+ * | | | | */
+ {0, G_1, I_1, H_1},
+ {0, G_2, I_2, H_2},
+ {0, G_3, I_3, H_3},
+ {0, G_4, I_4, H_4},
+ {0, G_5, I_5, H_5},
+ {0, G_6, I_6, H_6},
+ {0, G_7, I_7, H_7},
+ {0, G_8, I_8, H_8},
+ {0, G_9, I_9, H_9},
+ {0, G_10, I_10, H_10},
+ {0, G_11, I_11, H_11},
+ {0, G_12, I_12, H_12},
+ {0, G_13, I_13, H_13},
+ {0, G_14, I_14, H_14},
+
+ {0, D_1, F_1, E_1},
+ {0, D_2, F_2, E_2},
+ {0, D_3, F_3, E_3},
+ {0, D_4, F_4, E_4},
+ {0, D_5, F_5, E_5},
+ {0, D_6, F_6, E_6},
+ {0, D_7, F_7, E_7},
+ {0, D_8, F_8, E_8},
+ {0, D_9, F_9, E_9},
+ {0, D_10, F_10, E_10},
+ {0, D_11, F_11, E_11},
+ {0, D_12, F_12, E_12},
+ {0, D_13, F_13, E_13},
+ {0, D_14, F_14, E_14},
+
+ {0, A_1, C_1, B_1},
+ {0, A_2, C_2, B_2},
+ {0, A_3, C_3, B_3},
+ {0, A_4, C_4, B_4},
+ {0, A_5, C_5, B_5},
+ {0, A_6, C_6, B_6},
+ {0, A_7, C_7, B_7},
+ {0, A_8, C_8, B_8},
+ {0, A_9, C_9, B_9},
+ {0, A_10, C_10, B_10},
+ {0, A_11, C_11, B_11},
+ {0, A_12, C_12, B_12},
+ {0, A_14, C_14, B_14},
+
+ {1, D_14, F_14, E_14},
+ {1, D_12, F_12, E_12},
+ {1, D_11, F_11, E_11},
+ {1, D_10, F_10, E_10},
+ {1, D_9, F_9, E_9 },
+ {1, D_8, F_8, E_8 },
+ {1, D_7, F_7, E_7 },
+ {1, D_6, F_6, E_6 },
+ {1, D_5, F_5, E_5 },
+ {1, D_4, F_4, E_4 },
+ {1, D_3, F_3, E_3},
+ {1, D_1, F_1, E_1},
+
+ {1, A_14, C_14, B_14},
+ {1, A_13, C_13, B_13},
+ {1, A_12, C_12, B_12},
+ {1, A_8, C_8, B_8},
+ {1, A_4, C_4, B_4},
+ {1, A_3, C_3, B_3},
+ {1, A_2, C_2, B_2},
+ {1, A_1, C_1, B_1}
+};
+
+#define __ NO_LED
+
+led_config_t g_led_config = {
+ {
+ // Key Matrix to LED Index
+ { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 },
+ { 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 },
+ { 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, __, 40 },
+ { 41, __, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, __, 52 },
+ { 53, 54, 55, __, __, __, 56, __, __, __, 57, 58, 59, 60 }
+ },
+ {
+ // LED Index to Physical Position
+ {0, 0}, {13, 0}, {26, 0}, {35, 0}, {46, 0}, {57, 0}, {68, 0}, {79, 0}, {90, 0}, {101, 0}, {112, 0}, {123, 0}, {134, 0}, {145, 0},
+ {7,16}, {20,16}, {30,16}, {41,16}, {52,16}, {63,16}, {74,16}, {85,16}, {96,16}, {107,16}, {118,16}, {129,16}, {140,16}, {149,16},
+ {7,32}, {21,32}, {32,32}, {43,32}, {54,32}, {65,32}, {76,32}, {87,32}, {98,32}, {109,32}, {120,32}, {132,32}, {142,32},
+ {8,48}, {28,48}, {37,48}, {48,48}, {59,48}, {70,48}, {81,48}, {92,48}, {103,48}, {114,48}, {125,48}, {142,48},
+ {2,64}, {15,64}, {28,64}, {72,64}, {114,64}, {125,64}, {135,64}, {143,64}
+ },
+ {
+ // RGB LED Index to Flag
+ 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1,
+ 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+ 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1,
+ 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1,
+ 1, 1, 1, 4, 1, 1, 1, 1
+ }
+};
+#endif
diff --git a/keyboards/keychron/v4_max/ansi/config.h b/keyboards/keychron/v4_max/ansi/config.h
new file mode 100644
index 0000000000..814f02c8e7
--- /dev/null
+++ b/keyboards/keychron/v4_max/ansi/config.h
@@ -0,0 +1,65 @@
+/* Copyright 2024 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#pragma once
+
+#ifdef RGB_MATRIX_ENABLE
+/* RGB Matrix driver configuration */
+# define DRIVER_COUNT 2
+# define RGB_MATRIX_LED_COUNT 61
+
+# define SPI_SCK_PIN A5
+# define SPI_MISO_PIN A6
+# define SPI_MOSI_PIN A7
+
+# define DRIVER_CS_PINS \
+ { B8, B9 }
+# define SNLED23751_SPI_DIVISOR 16
+# define SPI_DRIVER SPID1
+
+/* Scan phase of led driver set as MSKPHASE_9CHANNEL(defined as 0x03 in snled27351.h) */
+# define SNLED27351_PHASE_CHANNEL MSKPHASE_9CHANNEL
+
+/* Set LED driver current */
+# define SNLED27351_CURRENT_TUNE \
+ { 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36 }
+
+/* Set to infinit, which is use in USB mode by default */
+# define RGB_MATRIX_TIMEOUT RGB_MATRIX_TIMEOUT_INFINITE
+
+/* Allow shutdown of led driver to save power */
+# define RGB_MATRIX_DRIVER_SHUTDOWN_ENABLE
+/* Turn off backlight on low brightness to save power */
+# define RGB_MATRIX_BRIGHTNESS_TURN_OFF_VAL 32
+
+/* Indications */
+# define BT_HOST_LED_MATRIX_LIST \
+ { 15, 16, 17 }
+
+# define P2P4G_HOST_LED_MATRIX_LIST \
+ { 18 }
+
+# define BAT_LEVEL_LED_LIST \
+ { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }
+
+# define CAPS_LOCK_INDEX 28
+# define LOW_BAT_IND_INDEX \
+ { 56 }
+
+# define RGB_MATRIX_KEYPRESSES
+# define RGB_MATRIX_FRAMEBUFFER_EFFECTS
+
+#endif
diff --git a/keyboards/keychron/v4_max/ansi/info.json b/keyboards/keychron/v4_max/ansi/info.json
new file mode 100644
index 0000000000..7189f699ee
--- /dev/null
+++ b/keyboards/keychron/v4_max/ansi/info.json
@@ -0,0 +1,77 @@
+{
+ "usb": {
+ "pid": "0x0940",
+ "device_version": "1.0.0"
+ },
+ "layouts": {
+ "LAYOUT_ansi_61": {
+ "layout": [
+ {"matrix": [0, 0], "x": 0, "y": 0},
+ {"matrix": [0, 1], "x": 1, "y": 0},
+ {"matrix": [0, 2], "x": 2, "y": 0},
+ {"matrix": [0, 3], "x": 3, "y": 0},
+ {"matrix": [0, 4], "x": 4, "y": 0},
+ {"matrix": [0, 5], "x": 5, "y": 0},
+ {"matrix": [0, 6], "x": 6, "y": 0},
+ {"matrix": [0, 7], "x": 7, "y": 0},
+ {"matrix": [0, 8], "x": 8, "y": 0},
+ {"matrix": [0, 9], "x": 9, "y": 0},
+ {"matrix": [0, 10], "x": 10, "y": 0},
+ {"matrix": [0, 11], "x": 11, "y": 0},
+ {"matrix": [0, 12], "x": 12, "y": 0},
+ {"matrix": [0, 13], "x": 13, "y": 0, "w": 2},
+
+ {"matrix": [1, 0], "x": 0, "y": 1, "w": 1.5},
+ {"matrix": [1, 1], "x": 1.5, "y": 1},
+ {"matrix": [1, 2], "x": 2.5, "y": 1},
+ {"matrix": [1, 3], "x": 3.5, "y": 1},
+ {"matrix": [1, 4], "x": 4.5, "y": 1},
+ {"matrix": [1, 5], "x": 5.5, "y": 1},
+ {"matrix": [1, 6], "x": 6.5, "y": 1},
+ {"matrix": [1, 7], "x": 7.5, "y": 1},
+ {"matrix": [1, 8], "x": 8.5, "y": 1},
+ {"matrix": [1, 9], "x": 9.5, "y": 1},
+ {"matrix": [1, 10], "x": 10.5, "y": 1},
+ {"matrix": [1, 11], "x": 11.5, "y": 1},
+ {"matrix": [1, 12], "x": 12.5, "y": 1},
+ {"matrix": [1, 13], "x": 13.5, "y": 1, "w": 1.5},
+
+ {"matrix": [2, 0], "x": 0, "y": 2, "w": 1.75},
+ {"matrix": [2, 1], "x": 1.75, "y": 2},
+ {"matrix": [2, 2], "x": 2.75, "y": 2},
+ {"matrix": [2, 3], "x": 3.75, "y": 2},
+ {"matrix": [2, 4], "x": 4.75, "y": 2},
+ {"matrix": [2, 5], "x": 5.75, "y": 2},
+ {"matrix": [2, 6], "x": 6.75, "y": 2},
+ {"matrix": [2, 7], "x": 7.75, "y": 2},
+ {"matrix": [2, 8], "x": 8.75, "y": 2},
+ {"matrix": [2, 9], "x": 9.75, "y": 2},
+ {"matrix": [2, 10], "x": 10.75, "y": 2},
+ {"matrix": [2, 11], "x": 11.75, "y": 2},
+ {"matrix": [2, 13], "x": 12.75, "y": 2, "w": 2.25},
+
+ {"matrix": [3, 0], "x": 0, "y": 3, "w": 2.25},
+ {"matrix": [3, 2], "x": 2.25, "y": 3},
+ {"matrix": [3, 3], "x": 3.25, "y": 3},
+ {"matrix": [3, 4], "x": 4.25, "y": 3},
+ {"matrix": [3, 5], "x": 5.25, "y": 3},
+ {"matrix": [3, 6], "x": 6.25, "y": 3},
+ {"matrix": [3, 7], "x": 7.25, "y": 3},
+ {"matrix": [3, 8], "x": 8.25, "y": 3},
+ {"matrix": [3, 9], "x": 9.25, "y": 3},
+ {"matrix": [3, 10], "x": 10.25, "y": 3},
+ {"matrix": [3, 11], "x": 11.25, "y": 3},
+ {"matrix": [3, 13], "x": 12.25, "y": 3, "w": 2.75},
+
+ {"matrix": [4, 0], "x": 0, "y": 4, "w": 1.25},
+ {"matrix": [4, 1], "x": 1.25, "y": 4, "w": 1.25},
+ {"matrix": [4, 2], "x": 2.5, "y": 4, "w": 1.25},
+ {"matrix": [4, 6], "x": 3.75, "y": 4, "w": 6.25},
+ {"matrix": [4, 10], "x": 10, "y": 4, "w": 1.25},
+ {"matrix": [4, 11], "x": 11.25, "y": 4, "w": 1.25},
+ {"matrix": [4, 12], "x": 12.5, "y": 4, "w": 1.25},
+ {"matrix": [4, 13], "x": 13.75, "y": 4, "w": 1.25}
+ ]
+ }
+ }
+}
diff --git a/keyboards/keychron/v4_max/ansi/keymaps/default/keymap.c b/keyboards/keychron/v4_max/ansi/keymaps/default/keymap.c
new file mode 100644
index 0000000000..a886e58f0a
--- /dev/null
+++ b/keyboards/keychron/v4_max/ansi/keymaps/default/keymap.c
@@ -0,0 +1,72 @@
+/* Copyright 2024 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#include QMK_KEYBOARD_H
+#include "keychron_common.h"
+
+enum layers {
+ MAC_BASE,
+ WIN_BASE,
+ _FN1,
+ _FN2,
+ _FN3,
+};
+
+// clang-format off
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ [MAC_BASE] = LAYOUT_ansi_61(
+ KC_ESC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_BSPC,
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSLS,
+ KC_CAPS, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_ENT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_RSFT,
+ KC_LCTL, KC_LOPT, KC_LCMD, KC_SPC, KC_RCMD, MO(_FN1), MO(_FN3), KC_RCTL),
+
+ [WIN_BASE] = LAYOUT_ansi_61(
+ KC_ESC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_BSPC,
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSLS,
+ KC_CAPS, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_ENT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_RSFT,
+ KC_LCTL, KC_LGUI, KC_LALT, KC_SPC, KC_RALT, MO(_FN2), MO(_FN3), KC_RCTL),
+
+ [_FN1] = LAYOUT_ansi_61(
+ KC_GRV, KC_BRID, KC_BRIU, KC_MCTL, KC_LPAD, RGB_VAD, RGB_VAI, KC_MPRV, KC_MPLY, KC_MNXT, KC_MUTE, KC_VOLD, KC_VOLU, KC_DEL,
+ _______, BT_HST1, BT_HST2, BT_HST3, P2P4G, _______, _______, _______, _______, _______, KC_INS, KC_PGUP, KC_HOME, _______,
+ RGB_TOG, RGB_MOD, RGB_VAI, RGB_HUD, RGB_SAI, RGB_SPI, _______, _______, KC_UP, KC_SNAP, KC_PGDN, KC_END, _______,
+ _______, RGB_RMOD, RGB_VAD, RGB_HUI, RGB_SAD, RGB_SPD, NK_TOGG, KC_LEFT, KC_DOWN, KC_RIGHT, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______),
+
+ [_FN2] = LAYOUT_ansi_61(
+ KC_GRV, KC_BRID, KC_BRIU, KC_TASK, KC_FILE, RGB_VAD, RGB_VAI, KC_MPRV, KC_MPLY, KC_MNXT, KC_MUTE, KC_VOLD, KC_VOLU, KC_DEL,
+ _______, BT_HST1, BT_HST2, BT_HST3, P2P4G, _______, _______, _______, KC_APP, KC_SCRL, KC_INS, KC_PGUP, KC_HOME, _______,
+ RGB_TOG, RGB_MOD, RGB_VAI, RGB_HUD, RGB_SAI, RGB_SPI, _______, _______, KC_UP, KC_PSCR, KC_PGDN, KC_END, _______,
+ _______, RGB_RMOD, RGB_VAD, RGB_HUI, RGB_SAD, RGB_SPD, NK_TOGG, KC_LEFT, KC_DOWN, KC_RIGHT, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______),
+
+ [_FN3] = LAYOUT_ansi_61(
+ KC_TILD, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, BAT_LVL, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______)
+};
+
+// clang-format on
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+ if (!process_record_keychron_common(keycode, record)) {
+ return false;
+ }
+ return true;
+}
diff --git a/keyboards/keychron/v4_max/ansi/keymaps/via/keymap.c b/keyboards/keychron/v4_max/ansi/keymaps/via/keymap.c
new file mode 100644
index 0000000000..a886e58f0a
--- /dev/null
+++ b/keyboards/keychron/v4_max/ansi/keymaps/via/keymap.c
@@ -0,0 +1,72 @@
+/* Copyright 2024 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#include QMK_KEYBOARD_H
+#include "keychron_common.h"
+
+enum layers {
+ MAC_BASE,
+ WIN_BASE,
+ _FN1,
+ _FN2,
+ _FN3,
+};
+
+// clang-format off
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+ [MAC_BASE] = LAYOUT_ansi_61(
+ KC_ESC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_BSPC,
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSLS,
+ KC_CAPS, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_ENT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_RSFT,
+ KC_LCTL, KC_LOPT, KC_LCMD, KC_SPC, KC_RCMD, MO(_FN1), MO(_FN3), KC_RCTL),
+
+ [WIN_BASE] = LAYOUT_ansi_61(
+ KC_ESC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_BSPC,
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSLS,
+ KC_CAPS, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_ENT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_RSFT,
+ KC_LCTL, KC_LGUI, KC_LALT, KC_SPC, KC_RALT, MO(_FN2), MO(_FN3), KC_RCTL),
+
+ [_FN1] = LAYOUT_ansi_61(
+ KC_GRV, KC_BRID, KC_BRIU, KC_MCTL, KC_LPAD, RGB_VAD, RGB_VAI, KC_MPRV, KC_MPLY, KC_MNXT, KC_MUTE, KC_VOLD, KC_VOLU, KC_DEL,
+ _______, BT_HST1, BT_HST2, BT_HST3, P2P4G, _______, _______, _______, _______, _______, KC_INS, KC_PGUP, KC_HOME, _______,
+ RGB_TOG, RGB_MOD, RGB_VAI, RGB_HUD, RGB_SAI, RGB_SPI, _______, _______, KC_UP, KC_SNAP, KC_PGDN, KC_END, _______,
+ _______, RGB_RMOD, RGB_VAD, RGB_HUI, RGB_SAD, RGB_SPD, NK_TOGG, KC_LEFT, KC_DOWN, KC_RIGHT, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______),
+
+ [_FN2] = LAYOUT_ansi_61(
+ KC_GRV, KC_BRID, KC_BRIU, KC_TASK, KC_FILE, RGB_VAD, RGB_VAI, KC_MPRV, KC_MPLY, KC_MNXT, KC_MUTE, KC_VOLD, KC_VOLU, KC_DEL,
+ _______, BT_HST1, BT_HST2, BT_HST3, P2P4G, _______, _______, _______, KC_APP, KC_SCRL, KC_INS, KC_PGUP, KC_HOME, _______,
+ RGB_TOG, RGB_MOD, RGB_VAI, RGB_HUD, RGB_SAI, RGB_SPI, _______, _______, KC_UP, KC_PSCR, KC_PGDN, KC_END, _______,
+ _______, RGB_RMOD, RGB_VAD, RGB_HUI, RGB_SAD, RGB_SPD, NK_TOGG, KC_LEFT, KC_DOWN, KC_RIGHT, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______),
+
+ [_FN3] = LAYOUT_ansi_61(
+ KC_TILD, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, BAT_LVL, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______)
+};
+
+// clang-format on
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+ if (!process_record_keychron_common(keycode, record)) {
+ return false;
+ }
+ return true;
+}
diff --git a/keyboards/keychron/v4_max/ansi/keymaps/via/rules.mk b/keyboards/keychron/v4_max/ansi/keymaps/via/rules.mk
new file mode 100644
index 0000000000..1e5b99807c
--- /dev/null
+++ b/keyboards/keychron/v4_max/ansi/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
diff --git a/keyboards/keychron/v4_max/ansi/rules.mk b/keyboards/keychron/v4_max/ansi/rules.mk
new file mode 100644
index 0000000000..7ff128fa69
--- /dev/null
+++ b/keyboards/keychron/v4_max/ansi/rules.mk
@@ -0,0 +1 @@
+# This file intentionally left blank
\ No newline at end of file
diff --git a/keyboards/keychron/v4_max/board.h b/keyboards/keychron/v4_max/board.h
new file mode 100644
index 0000000000..54fba748bf
--- /dev/null
+++ b/keyboards/keychron/v4_max/board.h
@@ -0,0 +1,226 @@
+/* Copyright 2024 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#pragma once
+
+#include_next
+
+// clang-format off
+
+/* Set GPIOA_SWDIO to INPUT and NOT FLOATING */
+#undef VAL_GPIOA_MODER
+#define VAL_GPIOA_MODER (PIN_MODE_INPUT(GPIOA_BUTTON) | \
+ PIN_MODE_INPUT(GPIOA_PIN1) | \
+ PIN_MODE_INPUT(GPIOA_PIN2) | \
+ PIN_MODE_INPUT(GPIOA_PIN3) | \
+ PIN_MODE_ALTERNATE(GPIOA_CS43L22_LRCK) |\
+ PIN_MODE_ALTERNATE(GPIOA_L3GD20_SCL) | \
+ PIN_MODE_ALTERNATE(GPIOA_L3GD20_SD0) | \
+ PIN_MODE_ALTERNATE(GPIOA_L3GD20_SDI) | \
+ PIN_MODE_INPUT(GPIOA_PIN8) | \
+ PIN_MODE_INPUT(GPIOA_VBUS_FS) | \
+ PIN_MODE_ALTERNATE(GPIOA_OTG_FS_ID) | \
+ PIN_MODE_ALTERNATE(GPIOA_OTG_FS_DM) | \
+ PIN_MODE_ALTERNATE(GPIOA_OTG_FS_DP) | \
+ PIN_MODE_INPUT(GPIOA_SWDIO) | \
+ PIN_MODE_INPUT(GPIOA_SWCLK) | \
+ PIN_MODE_INPUT(GPIOA_PIN15))
+
+#undef VAL_GPIOA_PUPDR
+#define VAL_GPIOA_PUPDR (PIN_PUPDR_FLOATING(GPIOA_BUTTON) | \
+ PIN_PUPDR_PULLUP(GPIOA_PIN1) | \
+ PIN_PUPDR_PULLUP(GPIOA_PIN2) | \
+ PIN_PUPDR_PULLUP(GPIOA_PIN3) | \
+ PIN_PUPDR_FLOATING(GPIOA_CS43L22_LRCK) |\
+ PIN_PUPDR_FLOATING(GPIOA_L3GD20_SCL) | \
+ PIN_PUPDR_PULLUP(GPIOA_L3GD20_SD0) | \
+ PIN_PUPDR_PULLUP(GPIOA_L3GD20_SDI) | \
+ PIN_PUPDR_PULLUP(GPIOA_PIN8) | \
+ PIN_PUPDR_FLOATING(GPIOA_VBUS_FS) | \
+ PIN_PUPDR_FLOATING(GPIOA_OTG_FS_ID) | \
+ PIN_PUPDR_FLOATING(GPIOA_OTG_FS_DM) | \
+ PIN_PUPDR_FLOATING(GPIOA_OTG_FS_DP) | \
+ PIN_PUPDR_PULLUP(GPIOA_SWDIO) | \
+ PIN_PUPDR_PULLUP(GPIOA_SWCLK) | \
+ PIN_PUPDR_PULLUP(GPIOA_PIN15))
+
+#undef VAL_GPIOB_MODER
+#define VAL_GPIOB_MODER (PIN_MODE_INPUT(GPIOB_PIN0) | \
+ PIN_MODE_INPUT(GPIOB_PIN1) | \
+ PIN_MODE_INPUT(GPIOB_PIN2) | \
+ PIN_MODE_INPUT(GPIOB_SWO) | \
+ PIN_MODE_INPUT(GPIOB_PIN4) | \
+ PIN_MODE_INPUT(GPIOB_PIN5) | \
+ PIN_MODE_INPUT(GPIOB_LSM303DLHC_SCL) | \
+ PIN_MODE_INPUT(GPIOB_PIN7) | \
+ PIN_MODE_INPUT(GPIOB_PIN8) | \
+ PIN_MODE_INPUT(GPIOB_LSM303DLHC_SDA) | \
+ PIN_MODE_INPUT(GPIOB_MP45DT02_CLK_IN) |\
+ PIN_MODE_INPUT(GPIOB_PIN11) | \
+ PIN_MODE_INPUT(GPIOB_PIN12) | \
+ PIN_MODE_INPUT(GPIOB_PIN13) | \
+ PIN_MODE_INPUT(GPIOB_PIN14) | \
+ PIN_MODE_INPUT(GPIOB_PIN15))
+
+#undef VAL_GPIOB_PUPDR
+#define VAL_GPIOB_PUPDR (PIN_PUPDR_PULLDOWN(GPIOB_PIN0) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_PIN1) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_PIN2) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_SWO) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_PIN4) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_PIN5) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_LSM303DLHC_SCL) |\
+ PIN_PUPDR_PULLDOWN(GPIOB_PIN7) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_PIN8) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_LSM303DLHC_SDA) |\
+ PIN_PUPDR_PULLDOWN(GPIOB_MP45DT02_CLK_IN) |\
+ PIN_PUPDR_PULLDOWN(GPIOB_PIN11) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_PIN12) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_PIN13) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_PIN14) | \
+ PIN_PUPDR_PULLDOWN(GPIOB_PIN15))
+
+#undef VAL_GPIOB_AFRL
+#define VAL_GPIOB_AFRL (PIN_AFIO_AF(GPIOB_PIN0, 0U) | \
+ PIN_AFIO_AF(GPIOB_PIN1, 0U) | \
+ PIN_AFIO_AF(GPIOB_PIN2, 0U) | \
+ PIN_AFIO_AF(GPIOB_SWO, 0U) | \
+ PIN_AFIO_AF(GPIOB_PIN4, 0U) | \
+ PIN_AFIO_AF(GPIOB_PIN5, 0U) | \
+ PIN_AFIO_AF(GPIOB_LSM303DLHC_SCL, 0) | \
+ PIN_AFIO_AF(GPIOB_PIN7, 0U))
+
+#undef VAL_GPIOB_AFRH
+#define VAL_GPIOB_AFRH (PIN_AFIO_AF(GPIOB_PIN8, 0U) | \
+ PIN_AFIO_AF(GPIOB_LSM303DLHC_SDA, 0) | \
+ PIN_AFIO_AF(GPIOB_MP45DT02_CLK_IN, 0U) |\
+ PIN_AFIO_AF(GPIOB_PIN11, 0U) | \
+ PIN_AFIO_AF(GPIOB_PIN12, 0U) | \
+ PIN_AFIO_AF(GPIOB_PIN13, 0U) | \
+ PIN_AFIO_AF(GPIOB_PIN14, 0U) | \
+ PIN_AFIO_AF(GPIOB_PIN15, 0U))
+
+/* C5 Need to be pulldown */
+#undef VAL_GPIOC_MODER
+#define VAL_GPIOC_MODER (PIN_MODE_INPUT(GPIOC_OTG_FS_POWER_ON) |\
+ PIN_MODE_INPUT(GPIOC_PIN1) | \
+ PIN_MODE_INPUT(GPIOC_PIN2) | \
+ PIN_MODE_INPUT(GPIOC_CS43L22_AIN4x) | \
+ PIN_MODE_INPUT(GPIOC_PIN4) | \
+ PIN_MODE_INPUT(GPIOC_PIN5) | \
+ PIN_MODE_INPUT(GPIOC_PIN6) | \
+ PIN_MODE_INPUT(GPIOC_CS43L22_MCLK) | \
+ PIN_MODE_INPUT(GPIOC_PIN8) | \
+ PIN_MODE_INPUT(GPIOC_PIN9) | \
+ PIN_MODE_INPUT(GPIOC_CS43L22_SCLK) | \
+ PIN_MODE_INPUT(GPIOC_PIN11) | \
+ PIN_MODE_INPUT(GPIOC_CS43L22_SDIN) | \
+ PIN_MODE_INPUT(GPIOC_PIN13) | \
+ PIN_MODE_INPUT(GPIOC_OSC32_IN) | \
+ PIN_MODE_INPUT(GPIOC_OSC32_OUT))
+
+#undef VAL_GPIOC_PUPDR
+#define VAL_GPIOC_PUPDR (PIN_PUPDR_PULLUP(GPIOC_OTG_FS_POWER_ON) |\
+ PIN_PUPDR_PULLUP(GPIOC_PIN1) | \
+ PIN_PUPDR_PULLUP(GPIOC_PIN2) | \
+ PIN_PUPDR_PULLUP(GPIOC_CS43L22_AIN4x) |\
+ PIN_PUPDR_PULLUP(GPIOC_PIN4) | \
+ PIN_PUPDR_PULLDOWN(GPIOC_PIN5) | \
+ PIN_PUPDR_PULLUP(GPIOC_PIN6) | \
+ PIN_PUPDR_PULLUP(GPIOC_CS43L22_MCLK) | \
+ PIN_PUPDR_PULLUP(GPIOC_PIN8) | \
+ PIN_PUPDR_PULLUP(GPIOC_PIN9) | \
+ PIN_PUPDR_PULLUP(GPIOC_CS43L22_SCLK) | \
+ PIN_PUPDR_PULLUP(GPIOC_PIN11) | \
+ PIN_PUPDR_PULLUP(GPIOC_CS43L22_SDIN) | \
+ PIN_PUPDR_PULLUP(GPIOC_PIN13) | \
+ PIN_PUPDR_PULLUP(GPIOC_OSC32_IN) | \
+ PIN_PUPDR_PULLUP(GPIOC_OSC32_OUT))
+
+/* Set all GPIOD pins to INPUT & PULLUP to avoid FLOATING */
+#undef VAL_GPIOD_MODER
+#define VAL_GPIOD_MODER (PIN_MODE_INPUT(GPIOD_PIN0) | \
+ PIN_MODE_INPUT(GPIOD_PIN1) | \
+ PIN_MODE_INPUT(GPIOD_PIN2) | \
+ PIN_MODE_INPUT(GPIOD_PIN3) | \
+ PIN_MODE_INPUT(GPIOD_CS43L22_RESET) | \
+ PIN_MODE_INPUT(GPIOD_OverCurrent) | \
+ PIN_MODE_INPUT(GPIOD_PIN6) | \
+ PIN_MODE_INPUT(GPIOD_PIN7) | \
+ PIN_MODE_INPUT(GPIOD_PIN8) | \
+ PIN_MODE_INPUT(GPIOD_PIN9) | \
+ PIN_MODE_INPUT(GPIOD_PIN10) | \
+ PIN_MODE_INPUT(GPIOD_PIN11) | \
+ PIN_MODE_INPUT(GPIOD_LED4) | \
+ PIN_MODE_INPUT(GPIOD_LED3) | \
+ PIN_MODE_INPUT(GPIOD_LED5) | \
+ PIN_MODE_INPUT(GPIOD_LED6))
+
+#undef VAL_GPIOD_PUPDR
+#define VAL_GPIOD_PUPDR (PIN_PUPDR_PULLUP(GPIOD_PIN0) | \
+ PIN_PUPDR_PULLUP(GPIOD_PIN1) | \
+ PIN_PUPDR_PULLUP(GPIOD_PIN2) | \
+ PIN_PUPDR_PULLUP(GPIOD_PIN3) | \
+ PIN_PUPDR_PULLUP(GPIOD_CS43L22_RESET) |\
+ PIN_PUPDR_PULLUP(GPIOD_OverCurrent) | \
+ PIN_PUPDR_PULLUP(GPIOD_PIN6) | \
+ PIN_PUPDR_PULLUP(GPIOD_PIN7) | \
+ PIN_PUPDR_PULLUP(GPIOD_PIN8) | \
+ PIN_PUPDR_PULLUP(GPIOD_PIN9) | \
+ PIN_PUPDR_PULLUP(GPIOD_PIN10) | \
+ PIN_PUPDR_PULLUP(GPIOD_PIN11) | \
+ PIN_PUPDR_PULLUP(GPIOD_LED4) | \
+ PIN_PUPDR_PULLUP(GPIOD_LED3) | \
+ PIN_PUPDR_PULLUP(GPIOD_LED5) | \
+ PIN_PUPDR_PULLUP(GPIOD_LED6))
+
+/* Set all GPIOE pins to INPUT & PULLUP to avoid FLOATING */
+#undef VAL_GPIOE_MODER
+#define VAL_GPIOE_MODER (PIN_MODE_INPUT(GPIOE_L3GD20_INT1) | \
+ PIN_MODE_INPUT(GPIOE_L3GD20_INT2) | \
+ PIN_MODE_INPUT(GPIOE_LSM303DLHC_DRDY) |\
+ PIN_MODE_INPUT(GPIOE_L3GD20_CS) | \
+ PIN_MODE_INPUT(GPIOE_LSM303DLHC_INT1) |\
+ PIN_MODE_INPUT(GPIOE_LSM303DLHC_INT2) |\
+ PIN_MODE_INPUT(GPIOE_PIN6) | \
+ PIN_MODE_INPUT(GPIOE_PIN7) | \
+ PIN_MODE_INPUT(GPIOE_PIN8) | \
+ PIN_MODE_INPUT(GPIOE_PIN9) | \
+ PIN_MODE_INPUT(GPIOE_PIN10) | \
+ PIN_MODE_INPUT(GPIOE_PIN11) | \
+ PIN_MODE_INPUT(GPIOE_PIN12) | \
+ PIN_MODE_INPUT(GPIOE_PIN13) | \
+ PIN_MODE_INPUT(GPIOE_PIN14) | \
+ PIN_MODE_INPUT(GPIOE_PIN15))
+
+#undef VAL_GPIOE_PUPDR
+#define VAL_GPIOE_PUPDR (PIN_PUPDR_PULLUP(GPIOE_L3GD20_INT1) | \
+ PIN_PUPDR_PULLUP(GPIOE_L3GD20_INT2) | \
+ PIN_PUPDR_PULLUP(GPIOE_LSM303DLHC_DRDY) |\
+ PIN_PUPDR_PULLUP(GPIOE_L3GD20_CS) | \
+ PIN_PUPDR_PULLUP(GPIOE_LSM303DLHC_INT1) |\
+ PIN_PUPDR_PULLUP(GPIOE_LSM303DLHC_INT2) |\
+ PIN_PUPDR_PULLUP(GPIOE_PIN6) | \
+ PIN_PUPDR_PULLUP(GPIOE_PIN7) | \
+ PIN_PUPDR_PULLUP(GPIOE_PIN8) | \
+ PIN_PUPDR_PULLUP(GPIOE_PIN9) | \
+ PIN_PUPDR_PULLUP(GPIOE_PIN10) | \
+ PIN_PUPDR_PULLUP(GPIOE_PIN11) | \
+ PIN_PUPDR_PULLUP(GPIOE_PIN12) | \
+ PIN_PUPDR_PULLUP(GPIOE_PIN13) | \
+ PIN_PUPDR_PULLUP(GPIOE_PIN14) | \
+ PIN_PUPDR_PULLUP(GPIOE_PIN15))
+
diff --git a/keyboards/keychron/v4_max/config.h b/keyboards/keychron/v4_max/config.h
new file mode 100644
index 0000000000..486d7cbbf9
--- /dev/null
+++ b/keyboards/keychron/v4_max/config.h
@@ -0,0 +1,78 @@
+/* Copyright 2024 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#pragma once
+
+/* Encoder Configuration */
+#define ENCODER_DEFAULT_POS 0x3
+#define ENCODER_MAP_KEY_DELAY 2
+
+#ifdef LK_WIRELESS_ENABLE
+/* Hardware configuration */
+# define P2P4_MODE_SELECT_PIN A10
+# define BT_MODE_SELECT_PIN A9
+
+# define LKBT51_RESET_PIN C4
+# define LKBT51_INT_INPUT_PIN B1
+# define BLUETOOTH_INT_OUTPUT_PIN A4
+
+# define USB_POWER_SENSE_PIN B0
+# define USB_POWER_CONNECTED_LEVEL 0
+
+# define BAT_CHARGING_PIN B13
+# define BAT_CHARGING_LEVEL 0
+
+# define BAT_LOW_LED_PIN B12
+# define BAT_LOW_LED_PIN_ON_STATE 1
+
+# define BT_HOST_DEVICES_COUNT 3
+
+# if defined(RGB_MATRIX_ENABLE)
+
+# define LED_DRIVER_SHUTDOWN_PIN B7
+
+/* Backlit disable timeout when keyboard is disconnected(unit: second) */
+# define DISCONNECTED_BACKLIGHT_DISABLE_TIMEOUT 40
+
+/* Backlit disable timeout when keyboard is connected(unit: second) */
+# define CONNECTED_BACKLIGHT_DISABLE_TIMEOUT 600
+
+/* Reinit LED driver on tranport changed */
+# define REINIT_LED_DRIVER 1
+
+# endif
+
+/* Keep USB connection in blueooth mode */
+# define KEEP_USB_CONNECTION_IN_WIRELESS_MODE
+
+/* Enable bluetooth NKRO */
+# define WIRELESS_NKRO_ENABLE
+
+/* Raw hid command for factory test and bluetooth DFU */
+# define RAW_HID_CMD 0xAA ... 0xAB
+#else
+/* Raw hid command for factory test */
+# define RAW_HID_CMD 0xAB
+#endif
+
+/* Factory test keys */
+#define FN_KEY_1 MO(4)
+#define BL_CYCLE_KEY KC_C
+#define BL_TRIG_KEY KC_L
+
+#define P2P4G_CELAR_MASK 0
+
+#define MATRIX_IO_DELAY 10
diff --git a/keyboards/keychron/v4_max/halconf.h b/keyboards/keychron/v4_max/halconf.h
new file mode 100644
index 0000000000..37bcc7c47b
--- /dev/null
+++ b/keyboards/keychron/v4_max/halconf.h
@@ -0,0 +1,31 @@
+/* Copyright 2024 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software : you can redistribute it and /or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.If not, see < http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#define _CHIBIOS_HAL_CONF_VER_8_0_
+
+#define HAL_USE_SPI TRUE
+
+#ifdef LK_WIRELESS_ENABLE
+# define HAL_USE_RTC TRUE
+#endif
+
+#if defined(LK_WIRELESS_ENABLE) || defined(ENCODER_ENABLE)
+# define PAL_USE_CALLBACKS TRUE
+#endif
+
+#include_next
diff --git a/keyboards/keychron/v4_max/info.json b/keyboards/keychron/v4_max/info.json
new file mode 100644
index 0000000000..d6b63ff366
--- /dev/null
+++ b/keyboards/keychron/v4_max/info.json
@@ -0,0 +1,70 @@
+{
+ "keyboard_name": "Keychron V4 Max",
+ "manufacturer": "Keychron",
+ "url": "https://github.com/Keychron",
+ "maintainer": "lokher",
+ "processor": "STM32F401",
+ "bootloader": "stm32-dfu",
+ "usb": {
+ "vid": "0x3434"
+ },
+ "features": {
+ "bootmagic": true,
+ "extrakey" : true,
+ "mousekey" : true,
+ "dip_switch" : true,
+ "nkro" : true,
+ "rgb_matrix": true,
+ "raw" : true,
+ "send_string" : true
+ },
+ "matrix_pins": {
+ "cols": ["C6", "C7", "C8", "A14", "A15", "C10", "C11", "C13", "C14", "C15", "C0", "C1", "C2", "C3"],
+ "rows": ["C12", "D2", "B3", "B4", "B5"]
+ },
+ "diode_direction": "ROW2COL",
+ "dip_switch" :{
+ "pins": ["A8"]
+ },
+ "rgb_matrix": {
+ "driver": "snled27351_spi",
+ "sleep": true,
+ "animations": {
+ "band_spiral_val": true,
+ "breathing": true,
+ "cycle_all": true,
+ "cycle_left_right": true,
+ "cycle_out_in": true,
+ "cycle_out_in_dual": true,
+ "cycle_pinwheel": true,
+ "cycle_spiral": true,
+ "cycle_up_down": true,
+ "digital_rain": true,
+ "dual_beacon": true,
+ "jellybean_raindrops": true,
+ "pixel_rain": true,
+ "rainbow_beacon": true,
+ "rainbow_moving_chevron": true,
+ "solid_reactive_multinexus": true,
+ "solid_reactive_multiwide": true,
+ "solid_reactive_simple": true,
+ "solid_splash": true,
+ "splash": true,
+ "typing_heatmap": true
+ }
+ },
+ "eeprom": {
+ "wear_leveling": {
+ "driver": "embedded_flash",
+ "logical_size": 2048,
+ "backing_size": 4096
+ }
+ },
+ "dynamic_keymap": {
+ "layer_count": 5
+ },
+ "build": {
+ "debounce_type": "sym_eager_pk"
+ },
+ "debounce": 20
+}
diff --git a/keyboards/keychron/v4_max/mcuconf.h b/keyboards/keychron/v4_max/mcuconf.h
new file mode 100644
index 0000000000..89294ee64b
--- /dev/null
+++ b/keyboards/keychron/v4_max/mcuconf.h
@@ -0,0 +1,37 @@
+/* Copyright 2024 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software : you can redistribute it and /or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.If not, see < http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include_next
+
+#undef STM32_HSECLK
+#define STM32_HSECLK 16000000
+
+#undef STM32_PLLM_VALUE
+#define STM32_PLLM_VALUE 8
+
+#undef STM32_PLLN_VALUE
+#define STM32_PLLN_VALUE 96
+
+#undef STM32_PLLP_VALUE
+#define STM32_PLLP_VALUE 4
+
+#undef STM32_PLLQ_VALUE
+#define STM32_PLLQ_VALUE 4
+
+#undef STM32_SPI_USE_SPI1
+#define STM32_SPI_USE_SPI1 TRUE
diff --git a/keyboards/keychron/v4_max/readme.md b/keyboards/keychron/v4_max/readme.md
new file mode 100644
index 0000000000..1d76668c23
--- /dev/null
+++ b/keyboards/keychron/v4_max/readme.md
@@ -0,0 +1,23 @@
+# Keychron V4 Max
+
+
+
+A customizable keyboard.
+
+* Keyboard Maintainer: [Keychron](https://github.com/keychron)
+* Hardware Supported: Keychron V4 Max
+* Hardware Availability: [Keychron V4 Max QMK/VIA Wireless Custom Mechanical Keyboard](https://www.keychron.com/products/keychron-v4-max-qmk-via-wireless-custom-mechanical-keyboard)
+
+Make example for this keyboard (after setting up your build environment):
+
+ make keychron/v4_max/ansi:default
+ make keychron/v4_max/iso:default
+
+Flashing example for this keyboard:
+
+ make keychron/v4_max/ansi_encoder:default:flash
+ make keychron/v4_max/iso_encoder:default:flash
+
+**Reset Key**: Toggle mode switch to "Cable", hold down the *Esc* key or reset button underneath space bar while connecting the USB cable,
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
diff --git a/keyboards/keychron/v4_max/rules.mk b/keyboards/keychron/v4_max/rules.mk
new file mode 100644
index 0000000000..4eaf6820bc
--- /dev/null
+++ b/keyboards/keychron/v4_max/rules.mk
@@ -0,0 +1,4 @@
+include keyboards/keychron/common/wireless/wireless.mk
+include keyboards/keychron/common/keychron_common.mk
+
+VPATH += $(TOP_DIR)/keyboards/keychron
diff --git a/keyboards/keychron/v4_max/v4_max.c b/keyboards/keychron/v4_max/v4_max.c
new file mode 100644
index 0000000000..9b36fb37c1
--- /dev/null
+++ b/keyboards/keychron/v4_max/v4_max.c
@@ -0,0 +1,78 @@
+/* Copyright 2024 @ Keychron (https://www.keychron.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#include "quantum.h"
+#include "keychron_task.h"
+#ifdef FACTORY_TEST_ENABLE
+# include "factory_test.h"
+# include "keychron_common.h"
+#endif
+#ifdef LK_WIRELESS_ENABLE
+# include "lkbt51.h"
+# include "wireless.h"
+# include "keychron_wireless_common.h"
+# include "battery.h"
+#endif
+
+#define POWER_ON_LED_DURATION 3000
+static uint32_t power_on_indicator_timer;
+
+#ifdef DIP_SWITCH_ENABLE
+bool dip_switch_update_kb(uint8_t index, bool active) {
+ if (index == 0) {
+ default_layer_set(1UL << (active ? 0 : 1));
+ }
+ dip_switch_update_user(index, active);
+
+ return true;
+}
+#endif
+
+void keyboard_post_init_kb(void) {
+#ifdef LK_WIRELESS_ENABLE
+ palSetLineMode(P2P4_MODE_SELECT_PIN, PAL_MODE_INPUT);
+ palSetLineMode(BT_MODE_SELECT_PIN, PAL_MODE_INPUT);
+ writePin(BAT_LOW_LED_PIN, BAT_LOW_LED_PIN_ON_STATE);
+
+ lkbt51_init(false);
+ wireless_init();
+#endif
+
+ power_on_indicator_timer = timer_read32();
+ keyboard_post_init_user();
+}
+
+bool keychron_task_kb(void) {
+ if (power_on_indicator_timer) {
+ if (timer_elapsed32(power_on_indicator_timer) > POWER_ON_LED_DURATION) {
+ power_on_indicator_timer = 0;
+#ifdef LK_WIRELESS_ENABLE
+ writePin(BAT_LOW_LED_PIN, !BAT_LOW_LED_PIN_ON_STATE);
+#endif
+ } else {
+#ifdef LK_WIRELESS_ENABLE
+ writePin(BAT_LOW_LED_PIN, BAT_LOW_LED_PIN_ON_STATE);
+#endif
+ }
+ }
+ return true;
+}
+
+#ifdef LK_WIRELESS_ENABLE
+bool lpm_is_kb_idle(void) {
+ return power_on_indicator_timer == 0 && !factory_reset_indicating();
+}
+#endif
diff --git a/keyboards/keychron/v4_max/via_json/v4_max_ansi.json b/keyboards/keychron/v4_max/via_json/v4_max_ansi.json
new file mode 100644
index 0000000000..b1d3574562
--- /dev/null
+++ b/keyboards/keychron/v4_max/via_json/v4_max_ansi.json
@@ -0,0 +1,229 @@
+{
+ "name": "Keychron V4 Max ANSI",
+ "vendorId": "0x3434",
+ "productId": "0x0940",
+ "keycodes": ["qmk_lighting"],
+ "menus": [
+ {
+ "label": "Lighting",
+ "content": [
+ {
+ "label": "Backlight",
+ "content": [
+ {
+ "label": "Brightness",
+ "type": "range",
+ "options": [0, 255],
+ "content": ["id_qmk_rgb_matrix_brightness", 3, 1]
+ },
+ {
+ "label": "Effect",
+ "type": "dropdown",
+ "content": ["id_qmk_rgb_matrix_effect", 3, 2],
+ "options": [
+ ["None", 0],
+ ["Solid Color", 1],
+ ["Breathing", 2],
+ ["Band Spiral Val", 3],
+ ["Cycle All", 4],
+ ["Cycle Left Right", 5],
+ ["Cycle Up Down", 6],
+ ["Rainbow Moving Chevron", 7],
+ ["Cycle Out In", 8],
+ ["Cycle Out In Dual", 9],
+ ["Cycle Pinwheel", 10],
+ ["Cycle Spiral", 11],
+ ["Dual Beacon", 12],
+ ["Rainbow Beacon", 13],
+ ["Jellybean Raindrops", 14],
+ ["Pixel Rain", 15],
+ ["Typing Heatmap", 16],
+ ["Digital Rain", 17],
+ ["Reactive Simple", 18],
+ ["Reactive Multiwide", 19],
+ ["Reactive Multinexus", 20],
+ ["Splash", 21],
+ ["Solid Splash", 22]
+ ]
+ },
+ {
+ "showIf": "{id_qmk_rgb_matrix_effect} > 1",
+ "label": "Effect Speed",
+ "type": "range",
+ "options": [0, 255],
+ "content": ["id_qmk_rgb_matrix_effect_speed", 3, 3]
+ },
+ {
+ "showIf": "{id_qmk_rgb_matrix_effect} != 0 && ( {id_qmk_rgb_matrix_effect} < 4 || {id_qmk_rgb_matrix_effect} == 18 || ({id_qmk_rgb_matrix_effect} > 17 && {id_qmk_rgb_matrix_effect} != 21) ) ",
+ "label": "Color",
+ "type": "color",
+ "content": ["id_qmk_rgb_matrix_color", 3, 4]
+ }
+ ]
+ }
+ ]
+ }
+ ],
+ "customKeycodes": [
+ {"name": "Left Option", "title": "Left Option", "shortName": "LOpt"},
+ {"name": "Right Option", "title": "Right Option", "shortName": "ROpt"},
+ {"name": "Left Cmd", "title": "Left Command", "shortName": "LCmd"},
+ {"name": "Right Cmd", "title": "Right Command", "shortName": "RCmd"},
+ {"name": "Misson Control", "title": "Misson Control in Mac", "shortName": "MCtl"},
+ {"name": "Lanuch Pad", "title": "Lanuch Pad in Windows", "shortName": "LPad"},
+ {"name": "Task View", "title": "Task View in Windows", "shortName": "Task"},
+ {"name": "File Explorer", "title": "File Explorer in Windows", "shortName": "File"},
+ {"name": "Screen shot", "title": "Screenshot in macOS", "shortName": "SShot"},
+ {"name": "Cortana", "title": "Cortana in Windows", "shortName": "Cortana"},
+ {"name": "Siri", "title": "Siri in macOS", "shortName": "Siri"},
+ {"name": "Bluetooth Host 1", "title": "Bluetooth Host 1", "shortName": "BTH1"},
+ {"name": "Bluetooth Host 2", "title": "Bluetooth Host 2", "shortName": "BTH2"},
+ {"name": "Bluetooth Host 3", "title": "Bluetooth Host 3", "shortName": "BTH3"},
+ {"name": "2.4G", "title": "2.4G", "shortName": "2.4G"},
+ {"name": "Battery Level", "title": "Show battery level", "shortName": "Batt"}
+ ],
+ "matrix": {"rows": 5, "cols" : 14},
+ "layouts": {
+ "keymap": [
+ [
+ {
+ "y": 0.25,
+ "c": "#777777"
+ },
+ "0,0\nESC",
+ {
+ "c": "#cccccc"
+ },
+ "0,1",
+ "0,2",
+ "0,3",
+ "0,4",
+ "0,5",
+ "0,6",
+ "0,7",
+ "0,8",
+ "0,9",
+ "0,10",
+ "0,11",
+ "0,12",
+ {
+ "c": "#aaaaaa",
+ "w": 2
+ },
+ "0,13"
+ ],
+ [
+ {
+ "w": 1.5
+ },
+ "1,0",
+ {
+ "c": "#cccccc"
+ },
+ "1,1",
+ "1,2",
+ "1,3",
+ "1,4",
+ "1,5",
+ "1,6",
+ "1,7",
+ "1,8",
+ "1,9",
+ "1,10",
+ "1,11",
+ "1,12",
+ {
+ "w": 1.5,
+ "c":"#aaaaaa"
+ },
+ "1,13"
+ ],
+ [
+ {
+ "w": 1.75
+ },
+ "2,0",
+ {
+ "c": "#cccccc"
+ },
+ "2,1",
+ "2,2",
+ "2,3",
+ "2,4",
+ "2,5",
+ "2,6",
+ "2,7",
+ "2,8",
+ "2,9",
+ "2,10",
+ "2,11",
+ {
+ "c": "#777777",
+ "w": 2.25
+ },
+ "2,13"
+ ],
+ [
+ {
+ "c": "#aaaaaa",
+ "w": 2.25
+ },
+ "3,0",
+ {
+ "c": "#cccccc"
+ },
+ "3,2",
+ "3,3",
+ "3,4",
+ "3,5",
+ "3,6",
+ "3,7",
+ "3,8",
+ "3,9",
+ "3,10",
+ "3,11",
+ {
+ "c": "#aaaaaa",
+ "w": 2.75
+ },
+ "3,13"
+ ],
+ [
+ {
+ "w": 1.25
+ },
+ "4,0",
+ {
+ "w": 1.25
+ },
+ "4,1",
+ {
+ "w": 1.25
+ },
+ "4,2",
+ {
+ "c": "#cccccc",
+ "w": 6.25
+ },
+ "4,6",
+ {
+ "c": "#aaaaaa",
+ "w": 1.25
+ },
+ "4,10",
+ {
+ "w": 1.25
+ },
+ "4,11",
+ {
+ "w": 1.25
+ },
+ "4,12",
+ {
+ "w": 1.25
+ },
+ "4,13"
+ ]
+ ]
+ }
+}
\ No newline at end of file
diff --git a/keyboards/keychron/v5_max/v5_max.c b/keyboards/keychron/v5_max/v5_max.c
index 4a4818f572..25949df514 100644
--- a/keyboards/keychron/v5_max/v5_max.c
+++ b/keyboards/keychron/v5_max/v5_max.c
@@ -68,7 +68,6 @@ bool keychron_task_kb(void) {
#ifdef LK_WIRELESS_ENABLE
writePin(BAT_LOW_LED_PIN, !BAT_LOW_LED_PIN_ON_STATE);
#endif
-
} else {
#ifdef LK_WIRELESS_ENABLE
writePin(BAT_LOW_LED_PIN, BAT_LOW_LED_PIN_ON_STATE);