RS232
<-->
MAX232
<-->
16F628
RS232
symbol
DB9
pin
MAX232
pin
PIC
symbol
PIC
pin
Function
RXD
2
13...12
RB1/RX
7
Receive data
TXD
3
14...11
RB2/TX
8
Transmit data
GND
5
15
GND
5
signal ground
16
Vcc
14
Module power