ZiLOG Z8 User Manual page 18

Z8 Microcontrollers
Z8 MCU Product Overview
1.1 Z8 MCU FAMILY OVERVIEW (Continued)
Low-Power: CMOS with two standby modes; STOP and
•
HALT.
Output
Port 3
Counter/
Timers (2)
Interrupt
Control
Analog
Comparators (2)
Port 2
I/O
(Bit Programmable)
1-2
Input
VCC
Register File
256 x 8-Bit
4
Address or I/O
(Nibble Programmable)
Figure 1-1. Z8 MCU Block Diagram
Full Z8 Instruction Set: Forty-eight basic instructions,
•
supported by six addressing modes with the ability to operate
on bits, nibbles, bytes, and words.
GND
ALU
FLAG
Register
Pointer
Port 0
4
XTAL
/AS /DS R//W /RESET
Machine Timing
& Instruction Control
RESET, WDT,
POR
Prg. Memory
512/K x 8-Bit
Program
Counter
Port 1
8
Address/Data or I/O
(Byte Programmable)
UM001601-0803
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