Z80 Datasheet, PDF (206/330 Pages) Zilog, Inc. – Z80 CPU PERIPHERALS

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7UGT /CPWCN

N/C
CS1
CLK/TRG3
CLK/TRG2
N/C
N/C
CLK/TRG1
CLK/TRG0
N/C
+5V
N/C
33
34
44
1
CMOS
Z80 PIO
22
IEO
IORQ
N/C
ZC/TO2
ZC/TO1
N/C
ZC/TO0
N/C
RD
GND
D7
12
11
Figure 5. 44-Pin QFP Pin Assignments
UM008101-0601
Parallel Input/Output