ZiLOG Z8 Technical Manual

Z8 Family Overview
dedicated I/O port registers, can be used as
accumulators. This eliminates the bottleneck com-
monly found in A/B devices, particularly in high-
speed applications such as disk drives, printers
and terminals. In addition, the registers can be
used as address pointers for indirect addressing,
as index registers or for implementing an on-chip
stack. Speed of execution and smooth programming
are supported by a "working register area"--short
4-bit register addresses.
Table 1-1 lists the basic characteristics of the
members of the Z8 Family. As shown, the major
differences between the products are in their
physical packaging and the manner in which address
space is handled. An overall description for each
Z8 type is given in the following sections.
Variations within each group are specified where
applicable.
Table 1-1. ZB Family of Products
ROM
Part Capacity Progr~able Dedicated PCB
Product Ntnber
(Bytes)
I/O Pins
I/O Pins Footprint
Conments
2K ROM Z8601
2K
32, 4 ports 8 Power, 40 Pin
Masked ROM part, used
Control
primarily for high volume
production.
2K Protopack Z8603
0 32, 4 ports 8 Power, 40 Pin
Piggyback
part used where
Control program flexibility is
plus
required (prototyping).
24 EPROM
4K ROM
Z8611 4K 32, 4 ports
8 Power, 40 Pin Masked ROM part, used
Control primarily for high volume
production.
4K Develop- Z8612 0 32, 4 ports 8 Power, 64 Pin ROMless part used primarily
ment part
Control
in development systems.
plus 24
external
memory
4K Protopack
Z8613 0 32, 4 ports 8 Power, 40 Pin Piggyback part used where
Control
program
flexibility is
plus required (prototyping).
24 EPROM
BASIC/ Z8671
2K 32, 4 ports 8 Power, 40 Pin BASIC/Debug part used in
Debug
Control low volume applications.
ROMless
Z8681/82 0 24, 3 ports
8 Power,
40 Pin
Low
cost ROMless production
Control
part with reduced I/O.
plus 8
Program memory is external.
external
memory
1-2

ZiLOG Z8 Specifications

General

Brand	ZiLOG
Model	Z8
Category	Desktop
Language	English