CMX813 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
Manufacturer
CMX813 Datasheet PDF : 21 Pages
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CMX813
Multi-Standard Analogue
Paging Decoder
D/813/3 December 2000
Provisional Issue
Features
Applications
• Pre-Programmed to Decode all Major • Two-Tone and 5/6-Tone Pagers
Two-Tone, 5/6-Tone and HSC Tonesets • Selective Calling (SELCALL) Systems
• Low Power: 0.5mA at 2.7V typically
• Superior Signal to Noise Performance
• Low Cost 3.58MHz Xtal/Clock
• µC Serial Interface + TSSOP Package
• Voice Pager Switching and Signalling
• Revertive Paging Systems
• Wireless Local Loop Signalling
• Audio Tone Signalling Applications
1.1 Brief Description
The CMX813 decodes the signalling 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 IRQN 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 (eg CCIR, EIA) has been
decoded, as a 4-bit hexadecimal tone value within the selected group.
To allow for cadence measurements, the IRQN 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
TSSOP (E4) and DIL (P3) packages.
© 2000 Consumer Microcircuits Limited
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