Z89135 View Datasheet(PDF) - Zilog

Part Name

Description

Manufacturer

Z89135

LOW-COST DTAD CONTROLLER

Zilog 

PRELIMINARY PRODUCT SPECIFICATION

1

Z89135/Z89136

1

LOW-COST DTAD CONTROLLER

FEATURES

Device

Z89135

Z89136

ROM

(KB)

24

24

RAM*

(Bytes)

256

256

I/O

Lines

47

47

Speed

(MHz)

20

20

s 24 KB of Z8 Program ROM (Z89135)

s Watch-Dog Timer and Power-On Reset

s Low Power STOP Mode

s On-Chip Oscillator which Accepts a Crystal or External

Clock Drive

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

s Global Power-Down Mode

s Low Power Consumption - 200 mW (typical)

s Two Comparators with Programmable Interrupt Priority

s Six Vectored, Priority Z8 Interrupts

s RAM and ROM Protect

s Clock Speed of 20.48 MHz

s 16-Bit Digital Signal Processor (DSP)

s 6K Word DSP Program ROM

s 512 Words On-Chip DSP RAM

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

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

s Three Vectored, Prioritized DSP Interrupts

s Two DSP Timers to Support Different A/D and

s D/A Sampling Rates

s Z8 and DSP Operation in Parallel

s IBM® PC-Based Development Tools

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

IBM is a registered trademark of International Business

Machines Corp.

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® MCU with 24

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.

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.

DS97TAD0300

PRELIMINARY

1-1

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