ZiLOG Z08617 Manual page 2

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