5. SYSTEM CONNECTOR INTERFACE
43
LZT 123 7589 R1A
The following circuit can be used to connect an LED.
Figure 5.10 Electrical connections for the LED
5.14 General Purpose Digital I/O Ports
Signals which have an entry in the Default Signal column in the above table
are multiplexed.
LED
10k
330
10k
BC817
GR47/48
DGND
VCC
Pin I/O port
signal
Default
signal
Description
21 IO1 IO1 Programmable Input/Output 1
KEYRow2
22 IO2 IO2 Programmable Input/Output 2
ADC5
23 IO3 IO3 Programmable Input/Output 3
KEYRow3
24 IO4 IO4 Programmable Input/Output 4
KEYRow4
13 IO5 IO5 Programmable Input/Output 5
ADC4
33 IO6 LED Programmable Input/Output 6/LED
43 IO7 TD3 Programmable Input/Output 7/TD3
44 IO8 RD3 Programmable Input/Output 8/RD3
39 IO9 RTS Programmable Input/Output 9/RTS
37 IN1 DTR Programmable Input 1
Data Terminal Ready
32 OUT3 DSR Programmable Output 3/DSR
36 OUT2 RI Programmable Output 2/RI
Ring Indicator
38 OUT1 DCD Programmable Output 1/DCD
Data Carrier Detect
40 OUT4 CTS Programmable Input/Output 4/CTS