Data Sheet

Smart Machine Smart Decision
SIM800F_Hardware Design_V1.00 16 2015-07-31
3.2 Pin Description
Table 4: Pin description
Pin name Pin number I/O Description Comment
Power supply
VBAT 55,56,57 I Power supply
VRTC 26 I/O Power supply for RTC
It is recommended to
connect with a battery or a
capacitor (e.g. 4.7uF)
VDD_EXT 15 O 2.8V output power supply Left floating if unused
GND
2,17,18,29,
39,45,46,54,
58,59,61,62,
63,64,65
Ground
Power on/off
PWRKEY 1 I
PWRKEY should be pulled low more
than 1 second then released to power
on/off the module.
Pulled up internally already
Audio interfaces
MICP 19
MICN 20
I Differential audio input
SPKP 21
SPKN 22
O Differential audio output
Left floating if unused
Status
STATUS 66 O Power on status indication
NETLIGHT 52 O Network status indication
Left floating if unused
LCD interface
DISP _CLK 11 O
DISP_DATA 12 I/O
DISP_D/C 13 O
DISP_CS 14 O
Display interface Left floating if unused
I2C interface
SDA 37 O I2C bus data
SCL 38 I/O I2C bus clock
Left floating if unused
Keypad interface / GPIO
KBR0 44 keypad row 0
KBR1 43 keypad row 1
KBR2 42 keypad row 2
KBR3 41 keypad row 3
KBR4 40 keypad row 4
KBC1 50
I/O
keypad column 1
Left floating if unused;
KBC1 can not be pulled
down during power on
procedure