Instruction Manual

Tentative
5
2.6 External Terminal
Table 1：Terminal function
No.
Terminal
name
I/O
Function
Internal
terminal
processing
1
NC
－
2
RxD
OUT
UART RxD
(Response Output)
3
TxD
IN
UART TxD
(Command Input)
4
NC
－
5
GND
－
signal ground
6
CLK
IN
reserved
Pull-down
7
STE
IN
reserved
Pull-down
8
SDA
IN
reserved
Pull-down
9
SCL
IN
Reserved
Pull-down
10
VCC
－
Power DC 3.8～8.5 Ｖ
11
RST
IN
CPU reset
12
3.3V
OUT
Test
13
Reserved
OUT
Reserved
Low
14
TEST
IN
Test