Z80 Datasheet, PDF (28/330 Pages) Zilog, Inc. – Z80 CPU PERIPHERALS

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CPU
Data Bus
CTC
Control
from CPU
Daisy-Chain
Interrupt
Control
D0
CLK/TRG0
D0
ZC/TO0
D1
CLK/TRG1
D2
ZC/TO1
D3
D4
CLK/TRG2
D5
ZC/TO2
D6
CLK/TRG3
D7
CE
RESET
CS0
CS1 _{Z80 CTC}
M1
IORQ
RD
IEI
IEO
INT
Channel
Signals
CLK +5V GND
Figure 4. CTC Pin Configuration
D4
D5
D6
D7
GND
RD
ZC/TO0
ZC/TO1
IZC/TO2
IORQ
IEO
INT
IEI
M1
1
28
2
27
3
26
4
25
5
24
6
23
7
8
Z80 CTC
22
21
9
20
10
19
11
18
12
17
13
16
14
15
D3
D2
D1
D0
+5V
CLK/TRG0
CLK/TRG1
CLK/TRG2
CLK/TRG3
CS1
CS0
RESET
CE
CLK
Figure 5. Package Configuration
UM008101-0601
Counter/Timer Channels