MCIMX7D-SABRE SDB - Use SD1 (SD card slot J6) for SDIO Wi-Fi Module

[daweichen]

Hi NXP,

I was wondering if the SD card slot (J6) on the MCIMX7D-SABRE SDB can support an 802.11ac Wi-Fi module in SDIO3.0 mode. 

Two areas of concern:

(1)

Looking at the schematic of the SDB, I noticed the current supply to NVCC_SD1 has max current 100mA.

The other SD2 ports shared the same the current supply (SW2_1V8), which has max current 1,250 mA.

(2)

The max power consumption of my Wi-Fi module is 630 mA.  I assume the VDD_SD1 can support it.

My goal is to boot the board from an eMMC (SD3 port) and drive an SDIO Wi-Fi module installed on the SD card slot (J6).

Thank you very much.

[igorpadykov]

Hi Dawei

seems you are right VDD_SD1 can support it, as it is produced from

MEM_3V3, capable of up to 1A, below part of i.MX7 Sabre schematic sch-28590.

NVCC_SD1  supplies only processor SD module and it is sufficient.

Best regards
igor
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