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16-pin LCD connector (J21)
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Pin Assignment for Crystal Clear technology CMC216x04 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
20-pin JTAG Debug Connector (P3)
Not used
1 2
T3V3
CPU_TRST
3 4
GND
CPU_TDI
5 6
GND
CPU_TMS
7 8
GND
CTCK
9 10
GND
Not used
11 12
GND
CPU_TDO
13 14
GND
CPU_RESET
15 16
GND
Not used
17 18
GND
Not used
19 20
GND
An external JTAG debug tool can be connected to a 20-pin P3 debug connector. Jumper J9 must be set to 2-3
position when using an external debugger.
iSYSTEM, December 2005 8/16