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CLM920 TD3 LTE Module Hardware Usage Guide
SDC2_
33
IO
CMD
VDD_
34
PO
SDIO
The SD card reference design of the CLM920 TD3 module is shown in the figure below：
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VOH
VOL
VOH
VOL
VIH
VIL
SDIO bus
command
VOH
VOL
VIH
VIL
SDIO bus
IO maximum output 50MA, output
pull-up
1.8V/2.85V configurable
power
supply
0.75*
2.95
VDD_Px
0
1.35
1.8
0
1.27
1.8
-0.3
0.75*
2.95
VDD_Px
0
0.625*
2.95
VDD_Px
-0.3
VDD_Px 2.95V voltage
domain
0.125*
2.95V voltage
VDD_Px
domain
2
1.8V voltage
domain
0.45
1.8V voltage
domain
2
1.8V voltage
domain
0.6
1.8V voltage
domain
VDD_Px 2.95V voltage
domain
0.125*
2.95V voltage
VDD_Px
domain
VDD_Px
2.95V voltage
+ 0.3
domain
0.25*
2.95V voltage
VDD_Px
domain
Cannot be
used for SD
card power
supply
- 49 -
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