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Z86C44

CMOS Z8® MCUS WITH ASCI UART OFFER EFFICIENT, COST-EFFECTIVE DESIGN FLEXIBILITY

Zilog 

PRELIMINARY PRODUCT SPECIFICATION

Z86C34/C35/C36

Z86C44/C45/C46

CMOS Z8® MCUS WITH ASCI UART

OFFER EFFICIENT, COST-EFFECTIVE

DESIGN FLEXIBILITY

FEATURES

Device

ROM

(KB)

Z86C34

16

Z86C35

32

Z86C36

64

Z86C44

16

Z86C45

32

Z86C46

64

Note: *General-Purpose.

RAM*

(Bytes)

237

237

237

236

236

236

Speed

(MHz)

16

16

16

16

16

16

• 28-Pin DIP, 28-Pin SOIC and PLCC Packages (C34,

C35, C36)

• 40-Pin DIP, 44-Pin PLCC and QFP Packages (C44,

C45, C46)

• 3.0- to 5.5-Volt Operating Range

• Clock Free Watch-Dog Timer (WDT) Reset

• Operating Temperature Ranges:

Standard: 0 °C to 70 °C

Extended: –40 °C to +105 °C

• Expanded Register File (ERF)

• Full-Duplex UART (ASCI)

• Dedicated 16-Bit Baud Rate Generator

• 32 Input/Output Lines (C44/C45/C46)

24 Input/Output Lines (C34/C35/C36)

• Vectored, Prioritized Interrupts with Programmable Po-

larity

• Two Analog Comparators

• Two Programmable 8-Bit Counter/Timers, Each with

Two 6-Bit Programmable Prescaler

• Watch-Dog Timer (WDT)/Power-On Reset (POR)

• On-Chip Oscillator that Accepts a Crystal, Ceramic Res-

onator, LC, RC, or External Clock

• RAM and ROM Protect

• Optional 32-kHz Oscillator

GENERAL DESCRIPTION

ZiLOG’s Z8® MCU single-chip family now includes the

Z86C34/C35/C36/C44/C45/C46 product line, featuring en-

hanced wake-up circuitry, programmable Watch-Dog Tim-

ers (WDT), and low-noise/EMI options. Each of the new en-

hancements to the Z8 offer a more efficient, cost-effective

design and provide the user with increased design flexibility

over the standard Z8 microcontroller core. The low-power

consumption CMOS microcontroller offers fast execution,

efficient use of memory, sophisticated interrupts, input/out-

put bit manipulation capabilities, and easy hardware/soft-

ware system expansion.

The Z8 subfamily features an Expanded Register File (ERF)

to allow access to register-mapped peripheral and I/O cir-

cuits. Four basic address spaces are available to support this

wide range of configurations: Program Memory, Register

File, Data Memory, and ERF. The Register File is composed

of 236/237 bytes of general-purpose registers, four I/O port

registers, and 15 control and status registers. The ERF con-

sists of twelve control registers.

For applications demanding powerful I/O capabilities, the

Z86C34/C35/C36 offers 24 pins, and the Z86C44/C45/C46

offers 32 pins dedicated to input and output. These lines are

DS007601-Z8X0499

1

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