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P

RELIMINARY

P

RODUCT

S

PECIFICATION

3

Z87100

PN M

ODULATOR

W

IRELESS

T

RANSMITTER

FEATURES

Part

Z87100

ROM

(Kbytes)

1

RAM*

(Bytes)

124

Package

Information

18-pin DIP & SOIC

s

s

s

3

Two Programmable 8-Bit Counter/Timers

6-Bit Programmable Prescaler

Six Vectored, Priority Interrupts (Two External, One

Software Generated)

Maximum Clock Speed of 12 MHz

Watch-Dog/Power-On Reset Timer

Analog Comparator with Programmable Interrupt

Polarity

On-Chip Oscillator that Accepts a RC, or External Clock

Drive

Low EMI Noise Mode

0

擄

to +70

擄

C Ultra-Low Power Operation at 10 kHz

Note:

*General-Purpose

s

s

3.0V to 5.5V Operating Range

On-Chip PN Modulator

Communications

for

Spread

Spectrum

s

s

s

s

s

s

s

ROM-Programmable PN Codes, up to 256 Bits ("Chips")

Fast Instruction Pointer - 1.0

碌

s @ 12 MHz

Two Standby Modes - STOP and HALT

12 Input/Output Lines (One with Comparator Input)

s

s

s

GENERAL DESCRIPTION

The Z87100 Wireless Controller is a member of the Z8

廬

single-chip microcontroller family and is manufactured in

CMOS technology. Zilog鈥檚 CMOS Z87100 microcontroller

offers fast execution, efficient use of memory, sophisticat-

ed interrupts, input/output bit manipulation capabilities,

and easy hardware/software system expansion along with

low cost and low power consumption.

The Z87100 architecture is based on Zilog鈥檚 8-bit micro-

controller core with the addition of an Expanded Register

File which allows access to register mapped peripheral

and I/O circuits. The Z87100 offers a flexible I/O scheme

and a number of ancillary features that are useful in many

consumer, industrial, automotive, and advanced scientific

applications.

The Z87100 is designed with specific features for wireless

spread spectrum applications using direct sequence pseu-

do-noise (PN) modulation. With up to 256 bits (鈥渃hips鈥? of

DS96WRL0700

specially designated 鈥淧N ROM鈥? one or more PN code se-

quences may be stored and used to PN-modulate data

generated by the Z87100. PN modulation is synchronous

with the data, using an integer number of PN chips per data

bit.

The Z87100 features an Internal Time Base Counter which

provides a real time clock for Stop-Mode Recovery or inter-

rupt at programmable intervals of 0.25 seconds, one sec-

ond, one minute and one hour. This requires an external

clock oscillator signal at 32.768 kHz.

Special PN modulator control registers allow the user to

select the desired PN modulator outputs, to choose the PN

clock source and PN sequence start address in PN ROM,

to stop/start and enable/disable the PN modulator, and to

determine whether a complete PN code sequence is mod-

ulated against a single bit or an integer fraction or multiple

of a single bit. The PN-modulated data may then be used

3-1

PRELIMINARY

next

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