Z84C90 ZILOG [Zilog, Inc.], Z84C90 Datasheet - Page 15

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

PS011802-0902
Control
Data
Bus I/O
CPU
From Output
The Ordering Information section lists temperature ranges and product numbers. Package
drawings are in the Package Information section. Refer to the Literature List for additional
documentation.
Figure 4. Test Load Diagram
Figure 5. PIO Block Diagram
Under Test
Interrupt Control Lines
Internal Bus
Internal
Interrupt
Control
Control
Logic
100 pF
3
250
A
+5V
Port A
Port B
KIO Serial/Parallel Counter Timer
I/O
I/O
2.1K
8
8
Data or
Control
Data or
Control
Handshake
Handshake
Peripheral
Interface
Z84C90
10