User's Manual

20
Appendix A: Connections
A.1. Pin Assignment
Pin # Signal Direction Description Signal Level
1
GND - Power Ground Ground
2
TxD Output UART Data Output TTL
3
RxD Input UART Data Input TTL
4
RTS Output UART Ready to Send TTL
5
CTS Input UART Clear to Send TTL
6
VDD Input DC Input (3.0~3.3V) Ground
7
Pairing Input Pairing Input TTL
8
Status Output Bluetooth Connect Detect (Active Low) TTL
9
DSR Input Data Set Ready TTL
10
DTR Output Data Terminal Ready TTL
11
RST Input Reset (Active Low) TTL
12
GND - Power Ground Ground