Z84C90 ZILOG [Zilog, Inc.], Z84C90 Datasheet - Page 18

• Manufacturer Part Number: Z84C90
• Description: KIO Serial/Parallel Counter Timer
• Manufacturer: ZILOG [Zilog, Inc.]

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