SIM Tech SIMCom SIM800C User Manual

Smart Machine Smart Decision
SIM800C_Hardware_Design_V1.00 14 2014-10-30
3.2. Pin Description
Table 5: Pin description
Pin name
Pin number
I/O
Description
Comment
Power supply
VBAT
34,35
I
Power supply
VDD_EXT
40
O
2.8V power output
If these pins are unused,
keep open.
GND
8,13,19,21,27,30,
31,33,36,37
Ground
GND for VBAT recommend
to use 36,37pin
Power on/down
PWRKEY
39
I
PWRKEY should be pulled low at
least 1 second and then released to
power on/down the module.
Internally pulled up to
VBAT.
Audio interfaces
MICP
9
I
Differential audio input
If these pins are unused,
keep open.
MICN
10
SPKP
11
O
Differential audio output
SPKN
12
GPIO
NETLIGHT
41
O
Network status
STATUS
42
O
Power on status
Serial port
UART1_DTR
6
I
Data terminal ready
If these pins are unused,
keep open.
UART1_RI
7
O
Ring indicator
UART1_DCD
5
O
Data carrier detect
UART1_CTS
4
O
Request to send
UART1_RTS
3
I
Clear to send
UART1_TXD
1
O
Transmit data
UART1_RXD
2
I
Receive data
UART2_TXD
22
O
Transmit data
UART2_RXD
23
I
Receive data
Debug interface
USB_VBUS
24
I
Debug and download
If these pins are unused,
keep open.
USB_DP
25
I/O
USB_DN
26
I/O
ADC
ADC
38
I
10bit general analog to digital
converter
If these pins are unused,
keep open.
SIM card interface
SIM_VDD
18
O
Voltage supply for SIM card.
Support 1.8V or 3V SIM card
All signals of SIM interface
should be protected against

SIM Tech SIMCom SIM800C Specifications

General

Brand	SIM Tech
Model	SIMCom SIM800C
Category	Control Unit
Language	English