User Guide

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21
GM500-U1G_A
Hardware Development Guide
SDIO_CMD 14 IO Secure digital CMD V
OL
max = 0.45V
V
OH
min = 1.35V
V
IL
min = -0.3V
V
IL
max = 0.63V
V
IH
min = 1.17V
VIH max = 2.1V
Pull-up to 1.8V through external 10K
resistance
SDIO_CLK 19 DO Secure digital CLK V
OL
max = 0.45V
V
OH
min = 1.35V
1.8V power domain
SDIO_DATA0 15 IO Secure digital IO data
bit 0
V
OL
max = 0.45V
V
OH
min = 1.35V
V
IL
min = -0.3V
V
IL
max = 0.63V
V
IH
min = 1.17V
VIH max = 2.1V
1.8V power domain
SDIO_DATA1 16 IO Secure digital IO data
bit 1
V
OL
max = 0.45V
V
OH
min = 1.35V
V
IL
min = -0.3V
V
IL
max = 0.63V
V
IH
min = 1.17V
VIH max = 2.1V
1.8V power domain
SDIO_DATA2 17 IO Secure digital IO data
bit 2
V
OL
max = 0.45V
V
OH
min = 1.35V
V
IL
min = -0.3V
V
IL
max = 0.63V
V
IH
min = 1.17V
VIH max = 2.1V
1.8V power domain
SDIO_DATA3 18 IO Secure digital IO data
bit 3
V
OL
max = 0.45V
V
OH
min = 1.35V
V
IL
min = -0.3V
V
IL
max = 0.63V
V
IH
min = 1.17V
VIH max = 2.1V
1.8V power domain
SD card Interface
Pin Name Pin NO. I/O Description DC Characteristics Comment
SDC2_DATA3 109 IO Secure digital
controller data bit 3
1.8V：
V
OL
max=0.45V
V
OH
min=1.4V
V
IL
min=-0.3V
V
IL
max=0.58V
V
IH
min=1.27V
V
IH
max=2.0V
3.0V：
SDC signal level can be selected
according to the signal level supported
by SD card. Please refer to SD 3.0
protocol for details.
If do not need SDC, leave this pin not
connected.
SDC2_DATA2 110 IO Secure digital
controller 2 data bit 2
SDC2_DATA1 108 IO Secure digital
controller 2 data bit 1