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DB9 male connector UART1 (P35)
Pin No. Symbol
2 RxD
3 TxD
5 GND
7 RTS
8 CTS
The serial port is configured as a standard RS232 interface with RTS/CTS control. Cross female to female cable
is needed for connection with PC computer COM port.
16-pin LCD connector (P21)
Top View
Pin Assignment for Crystal Clear technology CMC216x04 or EDT EW162B0GLY LCD
Pin No. Symbol Function
1 GND Ground Terminal
2 Vdd Supply Terminal
3 Vo Power Supply for LCD Driver
4 RS Register Select Signal
5 R/W Read/Write Selection
6 E Enable Signal
7 DB0 Data Bus Line (Not used)
8 DB1 Data Bus Line (Not used)
9 DB2 Data Bus Line (Not used)
10 DB3 Data Bus Line (Not used)
11 DB4 Data Bus Line
12 DB5 Data Bus Line
13 DB6 Data Bus Line
14 DB7 Data Bus Line
15 BL+ LED Backlight Power Supply
16 BL- LED Backlight Ground
Verify polarity of LED backlight on your LCD display!
iSYSTEM, March 2007 7/13