Z08617 Datasheet, PDF (2/26 Pages) Zilog, Inc. – NMOS Z8 8-BIT MCU KEYBOARD CONTROLLER

GENERAL DESCRIPTION (Continued)
Z08617 NMOS Z8^® 8-BIT MCU
KEYBOARD CONTROLLER
Output Input
Vcc GND
Port 3
Counter/
Timers (2)
Interrupt
Control
ALU
Flags
Register
Pointer
Register File
124 x 8-Bit
Machine Timing
& Instruction Control
WDT
POR
Program
Memory
Program
Counter
Port 2
Port 0
Port 1
I/O
(Bit Programmable)
4
4
I/O
Output Open-Drain
(Nibble Programmable)
8
I/O
Output Open-Drain
(Byte Programmable)
Figure 1. Z08617 Functional Block Diagram
2