System interface (continued) – Zilog Z16C35 User Manual
Page 234

Application Note
SCC in Binary Synchronous Communications
10-4
SYSTEM INTERFACE
(Continued)
Figure 4. Z8002 with SCC
4B
3B
2B
1B
GBA
4A
3A
2A
1A
/GAB
8
9
10
11
6
5
4
3
8
9
5
4
4B
3B
2B
1B
4A
3A
2A
1A
8
9
10
11
6
5
4
3
4B
3B
2B
1B
4A
3A
2A
1A
8
9
10
11
6
5
4
3
4B
3B
2B
1B
GBA
4A
3A
2A
1A
/GAB
8
9
10
11
6
5
4
3
13 1
13 1
13 1
13 1
4.7 K
V
+5V
IAD15
IAD14
IAD13
IAD12
IAD1
1
IAD10
IAD9
IAD8
IAD7
IAD6
IAD5
IAD4
IAD3
IAD2
IAD1
IAD0
/W
AIT
/ST
OP
/VI
/NVI
/NMI
/RESET
4MHZ
AD15
AD14
AD13
AD12
3
2
1
39
AD1
1
AD10
AD9
AD8
38
37
36
35
AD7
AD6
AD5
AD4
34
33
32
40
AD3
AD2
AD1
AD0
23
6
11
12
/W
AIT
/ST
OP
/VI
/NVI
13
14
30
/NMI
/RESET
CLOCK
18
16
3
14
2
4
17
6
1 14
18
16
3
14
LS
244
/AS
/DS
/MREQ
ST3
ST2
ST1
ST0
29
17
16
18
19
20
21
2
17
4
8
13
6
15
18
3
16
12
7
14
5
5
3
2
1
4
6
LS
138
LS
243
/GAB GBA
1 13
24
25
26
3
4
11
10
IAD15
IAD14
IAD13
IAD12
IAD1
1
IAD10
IAD9
IAD8
+5V
IAD0
IAD1
IAD2
IAD3
IAD4
IAD5
IAD6
IAD7
/VI
4MHZ
+5V
/IAS
/IDS
IR//W
+5V
40
1
39
2
38
3
37
4
5
20
7
6
35
36
34
32
33
/INT
ACK
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
/INT
PCLK
IEI
IEO
/AS
/DS
R//W
CSI
/CSO
TxDA
RxDA
/TRxCA
/W
AIT
/R
TxCA
15
13
14
10
12
13 /I/O
7
+5V
+5V
IR//W
IN//S
/EN
C
B
A
/EN
EN
/Y2
/IAS
/IDS
/IMREQ
4.7 K
V
4.7 K
V
LS
244
LS
243
Z8030
/VIACK
/R//W
N//S
/BUSACK
Z8002
Page 228 of 316
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