ZiLOG Z8 Technical Manual

This appendix contains pin information and physi-
cal descriptions for the Z8 development device
(Z8612) and Protopack emulator (Z8603/13). Pin
descriptions for the Z8601/11 and Z8681/82 micro-
computers can be found in Chapters 6 and 7,
respectively.
A.1 DEVELOPMENT DEVICE (Z8612)
The pin mnemonics and descriptions presented for
the Z8 microcomputers (Chapter 6) also apply to
the development device. Additional pin descrip-
tions are as follows:
A
O
-A
11
• Program Memory Address (outputs). These
lines are used to access the first 4K bytes of the
external program memory.
DO~. Program Data (inputs). Data from the
external program memory is input through these
pins.
lACK. Interrupt Acknowledge (output, active
High). lACK is driven High in response to an
interrupt during the interrupt machine cycle.
KlS. Program Memory Data Strobe (output, active
Low). MDS is Low during an instruction fetch
Appendix A
Pin Descriptions
and Functions
cycle when the first 4K bytes of program memory
are being accessed.
SClK. System Clock (output). SCLK is the inter-
nal clock output through a buffer. The clock rate
is equal to one-half the crystal frequency.
SYNC. Instruction Sync (output, active Low).
This strobe output is forced Low during the inter-
nal clock period preceding an opcode fetch.
A.2 PROTOPACK EMULATOR (Z860J/1J)
Both the Z8603 and Z8613 devices use a 40-pin
package that also has a 24-pin "piggy-back" soc-
ket. An EPROM or ROM can be installed on the back
of the emulator's standard 40-pin package via the
socket (Figure A-3). A single +5 V dc power source
is required. Figure A-4 illustrates the pinout for
the socket carried piggyback. The socket is
designed to accept a 2716 EPROM for the Z8603 and
a
2732 EPROM for the Z8613 device.
Pin mnemonics and descriptions. are the same as
those for the Z8601/11 microcomputer (Chapter 6).
Descriptions for the additional (24-pin socket)
memory interface lines are the same as those given
for the development devices above.
A-1

ZiLOG Z8 Specifications

General

Brand	ZiLOG
Model	Z8
Category	Desktop
Language	English