CMX148 Datasheet PDF - Consumer Microcircuits Limited
| Part Number | CMX148 | |
| Description | PMR Audio and Data Processor | |
| Manufacturers | Consumer Microcircuits Limited | |
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CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CMX148
PMR Audio and Data Processor
D/148/6 November 2010
Audio Processing, DTMF and FFSK/MSK Data Modem
with Auxiliary Functions for use in Analogue PMR Systems
Features
• Concurrent Audio/Signalling/Data Operations
• Complete Audio-band Processing:
o Selectable Audio Processing Order
o Pre and De-emphasis
o Selectable 2.55/3.0 kHz Filtering
o Selectable Audio HPF Cut-off
o Compandor
o Limiter
• Programmable Voice Scrambler
• MSK/FFSK Data Modem with Packet or Free-
format Modes with FEC, CRC, Interleaving and
Scrambling
• DTMF and Audio Tone Encoder/Decoder
• Routing to Support Host µController Signalling
• Sub-Audio Signalling Filters for CTCSS and DCS
• Dual Auxiliary ADC, 4 Multiplexed Inputs
• 4 x Auxiliary DACs
• Dual Programmable System Clock Outputs
• Tx Outputs for Single, Two-Point or I/Q
Modulation
• Microphone and Discriminator Analogue
Inputs
• Digital Gain Adjustment
• Default 3.6864MHz Xtal/Clock
• C-BUS Serial Interface to Host µController
• Flexible Powersave Modes
• Low-power 3.3V Operation
• Small VQFN and LQFP Packages
Host µC
Audio Out
Mic Input
Filtered Signal for Host Decoding
Host Generated Signalling
IRQ
C-BUS
Reference Clock
3.3V Supply
CMX148
PMR Voice and Data
Processor
Auxiliary
Multiplexed
ADC Inputs
Auxiliary
DACs
Modulator
Discriminator
Tx Enable
Rx Enable
System Clock 1
System Clock 2
RF
1. Brief Description
The CMX148 is a half-duplex, audio, signalling and data processing IC for use in PMR systems that utilise
the host µC to perform signalling, including CTCSS/DCS encoding/decoding. The device is intended for
use in general leisure and professional PMR terminals.
Comprehensive audio processing facilities include complete audio processing, filtering, companding, pre-
or de-emphasis and frequency inversion scrambling. The CMX148 features an FFSK/MSK data modem
for packetised or free-format data operations. Signal routing and filtering is included to assist host µC
based signal encoding/decoding applications.
A DTMF encoder/decoder, a full complement of auxiliary ADCs and DACs and dual synthesised clock
outputs are included in this low power PMR processor. The device also has flexible powersaving modes
and is available in 48-pin VQFN and LQFP packages.
© 2010 CML Microsystems Plc
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PMR Audio and Data Processor
CMX148
1.1. History
Version
6
5
2-4
1
Changes
•
• Removal of spurious notes 32 and 33, section 9.1.3
• Enhanced description of C-BUS latency time, just before Fig 4.
• Correction to Audio Tone ($CD) register, code 1100b, section 8.1.29.
• Correction to Program Block 4, registers P4.7, P4.10, P4.11, section 8.2.5.
• First documentation release
• Internal documentation updates
• Initial document created – based on 7031/7041FI-1.3 documentation
Date
25 Nov 10
09 Jul 09
11 Mar 09
02 Jul 08
© 2010 CML Microsystems Plc
5
D/148/6
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for CMX148 electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ CMX148.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| CMX148 | The function is PMR Audio and Data Processor. Consumer Microcircuits Limited | |
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