Microsd™ Card 2; Description; Operating Voltage; Limitations And Hardware Configuration - ST STM32H7B3I-EVAL User Manual

Hardware modifications are listed in
Pin name
PE3
PE4
PE5
1. Remove to avoid stub if necessary.
Note: If using SD card 1 (Default configuration), use FMC_NE3 = PG10, then SD card 2 cannot be used). If using SD
card 2, use FMC_NE3 = PC8 by fitting JP12 [2-3], then SD card 1 cannot be used.
8.3 microSD™ card 2
8.3.1

Description

™
A microSD card connector connected to the SDIO2 3.0 port of STM32H7B3LIH6QU is available on the board.
™
The microSD
It supports SD 3.0, SDR104, SDR50, DDR50, SDR25, SDR12 and SD 2.0 high-speed (50 MHz) and default
speed (25 MHz) modes.
SDIO2 signals are all supplied by VDDMMC. Make sure to supply 3.3 V or 1.8 V on VDDMMC (Refer to
6.3.5 ).
8.3.2

Operating voltage

As SDIO2 is in the VDDMMC domain (VDDMMC = 3.3 V or 1.8 V), when going to UHS1 mode (1.8 V), the
STG4160 switch U2 allows switching signals from 3.3 V to 1.8 V using the SD_LDO_SEL signal (PG6). 3V3_SW
and 1V8_SW can also be switched OFF using MFX IO0 and MFX IO8 in case a power-off sequence is needed.
8.3.3

Limitations and hardware configuration

Limitations with primary functions: camera and OCSPI1 (Refer to jumper configuration below)
Limitations with secondary functions: SRAM and OCSPI2
UM2662 - Rev 1
Table 49
Table 49. Configuration for SRAM A19-A22 (Just for the test)
Signal name
SAI1_SD_B
WIFI_SPI4_NSS
TRACED0
FMC_A19
SAI1_FS_A
TRACED1
DCMI_D4
FMC_A20
WIFI_SPI4_MISO
SAI1_SCK_A
TRACED2
FMC_A21
card detection is managed by SD_DETECT2 (PI11).
below:
Setting
JP34
R337
R93
R97
JP26
R340
R116
R88
R69
JP28
R71
R324
UM2662
microSD™ card 2
NOR
OFF
(1)
OFF
OFF (1)
ON just for test
N/A
N/A
N/A
ON just for test
N/A
N/A
N/A
ON just for test
Section
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