Half-size CP U C a r d
S B C - 6 5 9 R e v . B
Chapter 2 Quick Installation Guide
2 - 15
19
SIGNAL GND
20
N.C.
21
REQ
22
GND
23
IO WRITE
24
GND
25
IO READ
26
GND
27
IO READY
28
GND
29
DACK
30
GND
31
IRQ 14
32
N.C.
33
ADDR 1
34
ATA66DETECT
35
ADDR 0
36
ADDR 2
37
CS#1
38
CS#3
39
IDEACTP
40
GND
2.17 Digital I/O Connector (CN4)
SBC-659 offers 4 bit TTL Input / Output digital I/O functions. Input 801H;
GPI27 [bit1], GPI26[bit2], GPI25[bit3], GPI24[bit4] and Output 801H;
GPO23[bit1], GPO22[bit2], GPO21[bit3], GPO20[bit4]. With the input and
output consisting of the following:
Pin
Signal
Pin
Signal
1
IN1
2
IN2
3
IN3
4
IN4
5
OUT1
6
OUT2
7
OUT3
8
OUT4
9
+5V
10
GND
