Shanghai SIMCom Wireless Solutions Limited 201802 User Manual
Smart Machine Smart Decision
SIM7600V-H_User Manual_V1.00
2018-02-24
35
Table 18: Pin multiplex function list
Note
：
For more details of AT commands about GPIO multiplex function,please refer to
document [1].
3.11 Other interface
3.11.1 Sink Current Source
The ISINK pin is VBATtolerant and intended to drive some passive devices such as LCD backlight,
white LED, etc. Its output current can be up to 40 mA and be set by the AT command “AT+
CLEDITST”.
white LED, etc. Its output current can be up to 40 mA and be set by the AT command “AT+
CLEDITST”.
Table 19: Sink current electronic characteristic
Symbol
Description
Min.
Typ.
Max.
Unit
V
ISINK
Voltage tolerant
0.5
-
VBAT
V
I
ISINK
Current tolerant
0
-
40
mA
ISINK is a ground-referenced current sink. The following figure shows its reference circuit.
Figure 26: ISINK reference circuit
Pin Number Pin Name
Default Function
Alternate Function
4
SCL
SCL
GPIO11
5
SDA
SDA
GPIO10
12
USIM_DET
GPIO34
USIM_DET
18
PCM_CLK
PCM_CLK
GPIO23,SPI_CLK
I2C_SCL
19
PCM_SYNC PCM_SYNC
GPIO20,SPI_MOSI
20
PCM_IN
PCM_IN,
GPIO21,SPI_MISO
21
PCM_OUT
PCM_OUT
GPIO22,SPI_CS_N
I2C_SDA
I2C_SDA