SimCom SIM800 Hardware Design page 17

BT_ANT 53
RF synchronization
RF_SYNC 67
Other signal
RESET 16
KPLED 23
SIM800_Hardware Design_V1.10
I/O Bluetooth antenna port
O RF burst synchronous signal
I Reset input(Active low)
I Drive keypad backlight
17
Smart Machine Smart Decision
Impendence must be
controlled to 50Ω.
Do not pull up
2018-08-13