CN1 CN2 PF IO PU INT EXT   D-SUB25 D-SUB9
1 P17/IRQ3   23   I 1   SW4   1 FG 1 DCD
2 P16/IRQ2   22   I 1   SW3   2 TXD 2 RXD
3 P15/IRQ1   21   I 1   SW2   3 RXD 3 TXD
4 P14/IRQ0   20   I 1   SW1   4 RTS 4 DTR
5 P12 22     I 1     QFP only 5 CTS 5 GND
6 P11 21     I 1     QFP only 6 DSR 6 DSR
7 P10 20     I 1       7 SG 7 RTS
8 P22/TXD   19 TXD O   SP232 ×   8 DCD 8 CTS
9 P21/RXD   18 RXD I   SP232 ×   9 - 9 CI
10 P20/SCK3   17   O     LED 2   20 DTR - -
11 P57/SCL   4   I        
12 P56/SDA   3   I         LCD
13 P55/WKP5 19     I 1       14 D7 13 D6
14 P54/WKP4 18     I 1       12 D5 11 D4
15 P53/WKP3 17     I 1   DIP4   10 D3 9 D2
16 P52/WKP2 16     I 1   DIP3   8 D1 7 D0
17 P51/WKP1 15     I 1   DIP2   6 E 5 R/W
18 P50/WKP0 14     I 1   DIP1   4 RS 3 Vo
19 P76   7   I         2 Vss 1 Vdd
20 P75   6   I        
21 P74   5   I        
22 P87   16   O     LCD E  
23 P86   15   O     LCD RS  
24 P85/BOOT   14   I   JP2   JP2 Open=L,Short=H
25 P84   13   O     LED 1  
26 P83   12   O     LCD D7  
27 P82   11   O     LCD D6  
28 P81   10   O     LCD D5  
29 P80   9   O     LCD D4  
30 PB7/AN7 6     (I)       QFP only
31 PB6/AN6 5     (I)       QFP only
32 PB5/AN5 4     (I)       QFP only
33 PB4/AN4 3     (I)       QFP only
34 PB3/AN3 7     (I)        
35 PB2/AN2 8     (I)        
36 PB1/AN1 9     (I)        
37 PB0/AN0 10     (I)        
38 Avcc       I   Vcc ×  
39 VCL 11     I        
40 RES 12     I     RES SW  
41 NMI   8   I   JP3   JP3 Open=H,Short=L
42 TEST 13     I        
43 Vcc 23     I     5V  
44 12V 24     I     ×  
45 SP232 TXD   25   O     RXD  
46 SP232 RXD   24   I     TXD