eMMC / UFS Module Interface

The Radxa ROCK 4D features an onboard eMMC/UFS combo module interface that supports both eMMC and UFS modules, which can be used as a system boot drive or for expanding storage capacity.

danger

Do not use untested third-party UFS or eMMC modules. Some third-party modules may short the SBC and cause permanent hardware damage, and such damage is not covered by warranty.

tip

Since the ROCK 4D comes with SPI Nor Flash by default, eMMC modules are not supported. This guide only covers the use of UFS modules.

User Guide

eMMC modules are suitable for small capacity storage (8-128GB), while UFS modules are designed for larger capacity storage (64GB-1TB).

• Expanding Storage

You can directly install a UFS module into the eMMC/UFS module interface, then boot the system and use the lsblk command to verify if the UFS module is recognized.

• As a System Boot Drive

You can refer to the Install System to UFS Module tutorial to install the system image onto the UFS module. After installation, insert the UFS module into the eMMC/UFS module interface and test if the system boots normally.

The ROCK 4D is recommended to be used with our Radxa UFS Module.

caution

UFS Module Installation Steps:

1. Ensure the notched corner of the UFS module aligns with the eMMC/UFS module interface on the ROCK 4D
2. Make sure the bottom slot interface of the UFS module is properly aligned with the eMMC/UFS module interface on the ROCK 4D
3. Gently press down on one end of the UFS module until you hear a click, then repeat the process on the other end to ensure the UFS module is securely installed.

Interface Specifications

tip

For detailed interface specifications, please refer to the Hardware Design: Schematics in the download section.

Pin#	Name	Pin#	Name	Pin#	Name	Pin#	Name
1	GND	17	GND	33	FSPI0_D6 / EMMC_D6	49	GND
2	FSPI0_D5 / EMMC_D5	18	GND	34	GND	50	GND
3	GND	19	GND	35	GND	51	VCC1V2_UFS_VCCQ_S0
4	FSPI0_D4 / EMMC_D4	20	VCCIO_FLASH	36	UFS_TX_D0P	52	VCC1V2_UFS_VCCQ_S0
5	GND	21	VCCIO_FLASH	37	UFS_TX_D0N	53	VCC1V8_UFS_VCCQ2_S0
6	FSPI0_D0 / EMMC_D0	22	VCC_3V3_S3	38	GND	54	VCC1V8_UFS_VCCQ2_S0
7	GND	23	VCC_3V3_S3	39	UFS_TX_D1P	55	VCC_UFS_S0
8	FSPI0_CLK / EMMC_CLK	24	GND	40	UFS_TX_D1N	56	VCC_UFS_S0
9	GND	25	FSPI0_RSTN / EMMC_CMD	41	GND	57	UFS_RSTn
10	FSPI0_D3 / EMMC_D3	26	GND	42	UFS_REFCLK	58	GND
11	GND	27	FSPI0_D2 / EMMC_D2	43	GND	59	UFS_RX_D1N
12	FSPI0_CSNO / EMMC_RSTN	28	GND	44	NC	60	UFS_RX_D1P
13	GND	29	FSPI0_D1 / EMMC_D1	45	NC	61	GND
14	GND	30	GND	46	UFS_PLUG	62	UFS_RX_D0N
15	FSPI0_DQS / EMMC_STRB	31	FSPI0_D7 / EMMC_D7	47	NC	63	UFS_RX_D0P
16	GND	32	GND	48	NC	64	GND