Zilog Z08470 - Manual (Page 224)

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UM008101-0601 Parallel Input/Output
Figure 16. Control Mode Application
Z80 CPU Z80 PIO
Industrial
Processing
System
B/A C/D CE
A15–A0
D7–D0
Spec. Test
Turn on Pwr.
Pwr. Fail Alm.
HALT
Temp. Alm.
HTRS. on
Press. Sys
Press. Alm.
A7
A5
A4
A3
A2
A1
A0
A6
Port A Bus
Address
Decoder