CMX813 Просмотр технического описания (PDF) - MX-COM Inc

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CMX813

Multi-standart analog paging decoder

MX-COM Inc  

COMMUNICATION SEMICONDUCTORS

DATA BULLETIN

CMX813

Multi-Standard Analog

Paging Decoder

Features

• Pre-Programmed to Decode all Major

Two-Tone, 5/6-Tone and HSC Tonesets

• Low Power: 0.5mA at 2.7V typically

• Superior Signal to Noise Performance

• Low Cost 3.58MHz Xtal/Clock

• µC Serial Interface + TSSOP Package

SIGNAL IN

Amplifier

-

+

VDD /2

OPAMP OUT

DIGITAL FILTER

VDD

VSS

ROM

ADVANCE INFORMATION

Applications

• Two-Tone and 5/6-Tone Pagers

• Selective Calling (SELCALL) Systems

• Voice Pager Switching and Signaling

• Revertive Paging Systems

• Wireless Local Loop Signaling

• Audio Tone Signaling Applications

FREQUENCY

ASSESSMENT AND

MEASUREMENT

XTAL AND

CLOCKS

XTAL

XTAL/ CLOCK

SEQUENCER

AND COMPARE

RAM

C-BUS

INTERFACE

AND

CONTROL

LOGIC

IRQ

REPLY DATA

CS

COMMAND DATA

SERIAL CLOCK

The CMX813 decodes the signaling tones for the Motorola Quick Call series, GE groups A, B and C and the

tonesets employed by the Zetron, Reach and Plectron 2-tone radio paging systems. It also decodes the tones

for Motorola 5/6-tone paging and the EIA, CCIR, ZVEI1 and EEA tonesets used for HSC radio paging and

SELCALL. A simple serial interface allows the host µC to specify the individual tone(s), or group of tones, to

be decoded from the extensive list held by the CMX813.

When the µC receives an IRQ it examines the STATUS and DECODED TONE ADDRESS Registers to

reveal the tone decoded. In 2-tone mode, the CMX813 will report which of the (up to eight) selected tones it

has decoded. This report is an 8-bit index number to the tone in the programmed list. For 5/6-tone or HSC

groups, the CMX813 will report which tone in the selected system toneset (e.g. CCIR, EIA) has been

decoded, as a 4-bit hexadecimal tone value within the selected group.

To allow for cadence measurements, the IRQ is activated again when the tone is no longer present. A status

value of “No-tone” is returned. The CMX813 is designed to operate over a wide temperature range with a

typical operating current of 0.5mA at 2.7Volts. It also has a Zero-Power mode and is available in

16-pin TSSOP (CMX813E4) and 16-pin DIP (CMX813P3) packages.

¤2000 MX-COM, Inc.

www.mxcom.com tel: 336 744 5050 800 638 5577 fax: 336 744 5054

Doc. # 20480220.002

4800 Bethania Station Road, Winston-Salem, NC 27105-1201, USA All trademarks and service marks are held by their respective customers.

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