Z53C80 Datasheet, PDF (4/40 Pages) Zilog, Inc. – SMALL COMPUTER SYSTEM INTERFACE (SCSI)

ZILOG
GENERAL DESCRIPTION (Continued)
/DB7
/RST
GND
/BSY
/SEL
/ATN
N/C
/RESET
IRQ
DRQ
/EOP
/DACK
GND
READY
A0
A1
A2
N/C
/CS
/IOW
/IOR
D7
D6
D5
1
48
2
47
3
46
4
45
5
44
6
43
7
42
8
41
9
40
10
39
11
38
12 ^Z53C80 37
SCSI
13
36
14
35
15
34
16
33
17
32
18
31
19
30
20
29
21
28
22
27
23
26
24
25
/DB6
/DB5
GND
/DB4
/DB3
/DB2
N/C
/DB1
/DB0
GND
/DBP
/REQ
/ACK
I//O
GND
C//D
/MSG
N/C
D0
D1
D2
D3
D4
VCC
Figure 3. 48-Pin DIP Pin Assignments
Z53C80 SCSI
/RESET
IRQ
DRQ
/EOP
/DACK
GND
READY
A0
A1
A2
/CS
6 5 4 3 2 1 44 43 42 41 40
7
39
8
38
9
37
10
36
11
35
12
Z53C80
SCSI
34
13
33
14
32
15
31
16
30
17
29
18 19 20 21 22 23 24 25 26 27 28
/DB2
/DB1
/DB0
GND
/DBP
/REQ
/ACK
I//O
GND
C//D
/MSG
Figure 4. 44-Pin PLCC Pin Assignments
4
PS97SCC0200