Z84C90 Datasheet, PDF (18/31 Pages) Zilog, Inc. – KIO Serial/Parallel Counter Timer

Z84C90
KIO Serial/Parallel Counter Timer
13
Channel A
Control
and
Status
Registers
Internal
Control
Logic
I
n
t
Data
8
e
CPU
r
Bus
n
I/O
a
Control
7
l
B
u
s
Interrupt
Interrupt
Control
Lines
Control
Logic
Channel B
Control
and
Status
Registers
Figure 9. SIO Block Diagram
Channel A
Channel A
Control
and
Status
Channel B
Control
and
Status
Channel B
Serial
Data
Channel
Clocks
Sync
Wait/Ready
Modem or
Other
Control
Modem or
Other
Control
Serial
Data
Channel
Clocks
Sync
Wait/Ready
PS011802-0902