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MeiG_SLM156_Hardware Design Manual
MeiG Smart Technology Co., Ltd
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3.3 Pin Description
The following table shows the SLM156’s pin definition.
Table 3 IO parameters definition
Type
Description
IO
Input and output
DI
Digital input
DO
Digital output
PI
Power input
PO
Power output
AI
Analog input
AO
Analog output
OD
Open drain
Table 4 Pin description
Power
Pin name
I/O Description
DC features
Note
VBAT
59.60.61
PI
Power supply
for module
baseband
Vmax=4.2V
Vmin=3.3V
Vnorm=3.8V
VDD_EXT
64
PO Output 1.8V
Vnorm=1.8V
Iomax=80mA
Provide external
pull-up to GPIO,
if unused, keep it
open.
VDD_AUDIO
55
PO Output 1.8V
Vnorm=1.8V
Iomax=80mA
Provide power
for SIM
GND
1,2,3,4,6,7,8,9
,11,12,13,14,1
5,22,27,30,48,
51,58,62,63
-
Ground
-
-