Z89135 Zilog., Z89135 Datasheet

Z89135

Manufacturer Part Number

Z89135

Description

Low-Cost DTAD Controller

Manufacturer

Zilog.

Datasheet

1.Z89135.pdf (66 pages)

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FEATURES

Device

Z89135

Z89136

GENERAL DESCRIPTION

The Z89135/136 is a fully integrated, dual processor con-

troller designed for low-cost digital telephone answering

machines. The I/O control processor is a Z8

KB of program memory, two 8-bit counter/timers, and up to

47 I/O pins. The DSP is a 16-bit processor with a 24-bit

ALU and accumulator, 512 x 16 bits of RAM, single cycle

instructions, and 6K word program ROM plus constants

memory. The chip also contains a half-flash 8-bit A/D con-

verter with up to 128 kHz sample rate and 10-bit PWM D/A

converter. The sampling rates for the converters are pro-

grammable. The precision of the 8-bit A/D may be extend-

ed by resampling the data at a lower rate in software.

DS97TAD0300

24 KB of Z8 Program ROM (Z89135)

Watch-Dog Timer and Power-On Reset

Low Power STOP Mode

On-Chip Oscillator which Accepts a Crystal or External

Clock Drive

Two 8-Bit Z8 Counter Timers with 6-Bit Prescaler

Global Power-Down Mode

Low Power Consumption - 200 mW (typical)

Two Comparators with Programmable Interrupt Priority

Six Vectored, Priority Z8 Interrupts

RAM and ROM Protect

ROM

(KB)

(Bytes)

RAM*

256

Lines

I/O

MCU with 24

Speed

(MHz)

P R E L I M I N A R Y

Z89135/Z89136

IBM is a registered trademark of International Business

Machines Corp.

The Z8 and DSP processors are coupled by mailbox regis-

ters and an interrupt system, which allows DSP or Z8 pro-

grams to be directed by events in each other’s domain.

The Z89136 is the ROMless version of the Z89135. The

DSP is not ROMless. The DSP's program memory is al-

ways the internal ROM.

Clock Speed of 20.48 MHz

16-Bit Digital Signal Processor (DSP)

6K Word DSP Program ROM

512 Words On-Chip DSP RAM

8-Bit A/D Converter with up to 128 kHz Sample Rate

10-Bit PWM D/A Converter (4 kHz to 64 kHz)

Three Vectored, Prioritized DSP Interrupts

Two DSP Timers to Support Different A/D and

D/A Sampling Rates

Z8 and DSP Operation in Parallel

IBM

Developer’s Toolbox for T.A.M. Applications

-C

RELIMINARY

OST

PC-Based Development Tools

DTAD C

RODUCT

ONTROLLER

PECIFICATION

1-1

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