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Z86C63/64

CPS DC-5461-02

PRELIMINARY

Z86C63/64

GENERAL DESCRIPTION

The Z86C63/64 microcontroller introduces a new level of

sophistication to single-chip architecture. The Z86C63/64

is a member of the Z8 single-chip microcontroller family

with 32 Kbytes of ROM and 256 bytes of RAM.

The Z86C63 is housed in a 40-pin DIP, and a 44-pin PLCC

package, and is manufactured in CMOS technology. The

ROMless pin option is available on the 44-pin version only.

The Z86C64 is housed in a 64-pin DIP, and a 68-pin PLCC.

Both versions of the Z86C64 have the ROMless pin option,

which allows both external memory and preprogrammed

ROM, enabling this Z8 microcontroller to be used in high-

volume applications or where code flexibility is required.

The Z86C96 ROMless Z8 will support the Z86C63/64.

Zilog’s CMOS microcontroller offers fast execution, more

efficient use of memory, more sophisticated interrupts,

input/output bit manipulation capabilities, and easy hard-

ware/software system expansion along with low cost and

low power consumption.

The Z86C63/64 architecture is characterized by Zilog’s

8-bit microcontroller core. The device offers a flexible I/O

scheme, an efficient register and address space structure,

multiplexed capabilities between address/data, I/O, and a

number of ancillary features that are useful in many indus-

trial and advanced scientific applications.

For applications which demand powerful I/O capabilities,

the Z86C63 fulfills this with 32 pins dedicated to input and

output. These lines are grouped into four ports with eight

lines each. The Z86C64 has 52 pins for input and output,

and these lines are grouped into six, 8-bit ports and one

4-bit port. Each port is configurable under software control

to provide timing, status signals, serial or parallel

I/O with or without handshake, and an address/data bus

for interfacing external memory.

There are three basic address spaces available to support

this wide range of configurations: Program Memory, Data

Memory, and 236 General-Purpose Registers.

To unburden the program from coping with the real-time

problems such as counting/timing and serial data commu-

nication, the Z86C63/64 offers two on-chip counter/timers

with a large number of user selectable modes, and an

asynchronous receiver/transmitter (UART) (see Block Dia-

grams).

Notes:

All Signals with a preceding front slash, "/", are active Low, e.g.,

B//W (WORD is active Low); /B/W (BYTE is active Low, only).

Power connections follow conventional descriptions below:

Connection

Circuit

Device

Power

V

CC

V

DD

Ground

GND

V

SS

DC-5461-02 (12-13-93)