SimCom SIM800L Hardware Design page 17

NETLIGHT 64
STATUS 4
Serial port
DTR 69
RI 68
DCD 70
CTS 34
RTS 33
TXD 32
RXD 31
Debug interface
VBUS 7
USB_DP 59
USB_DN 19
ADC
ADC 50
PWM
PWM 26
I2C
SDA 75
SCL 74
SIM card interface
SIM_VDD 16
SIM_DATA 14
SIM_CLK 55
SIM_RST 15
SIM_DET 54
Antenna interface
GSM_ANT 40
FM_ANT 17
Synchronizing signal of RF
RF_SYNC 5
Other
RESET 49
ISINK1 46
ISINK0 47
NC 36、57
SIM800L(MT6261)_Hardware Design_V1.01
O Network status
O Power on status
I Data terminal ready
O Ring indicator
O Data carrier detect
O Request to send
I Clear to send
O Transmit data
I Receive data
I
I/O Debug and download
I/O
10bit general analog to digital
I
converter
O Pulse-width modulation
I/O Open drain output
O Open drain output
Voltage supply for SIM card.
O
Support 1.8V or 3V SIM card
I/O SIM data input/output
O SIM clock
O SIM reset
I SIM card detection
I/O Connect GSM antenna
I Antenna for FM
O Synchronizing signal of RF
I Reset input(Active low)
I Drive keypad backlight
I Drive LCD backlight
- Unconnected
Smart Machine Smart Decision
If these pins are unused,
keep open.
If these pins are unused,
keep open.
If these pins are unused,
keep open.
If these pins are unused,
keep open.
If these pins are unused,
keep open.
All signals of SIM interface
should be protected against
ESD with a TVS diode
array.
If these pins are unused,
keep open.
KEEP OPEN
17 2016-07-07