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PDF CMX7011 Data sheet ( Hoja de datos )
| Número de pieza | CMX7011 | |
| Descripción | Digital Voice Processor | |
| Fabricantes | Consumer Microcircuits Limited | |
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CML Microcircuits
COMMUNICATION SEMICONDUCTORS
CMX7011
Digital Voice
Processor
D/7011_FI1.x/6 April 2013
DATASHEET
Provisional Issue
7011FI-1.x: Digital Voice Encryption for Analogue Radio Systems
Features
Applications
Digital voice security on analogue PMR channels
(12.5kHz/25kHz)
Simple interfacing, via audio connections, to existing
PMR radio
Ultimate in high-level analogue radio security
Embedded RALCWI Vocoder (supplied under licence
and royalty free)
Embedded audio-band modem
Built in robust over-air data protocol with good tolerance
to bit errors
Ultimate in high-level analogue radio security
Real-time voice security
Voice encryption on analogue PMR radios
Secure wireless door access and gate
entry systems
Providing the digital advantage on
analogue radio systems
A Plug and Play device (the CMX188) can
be made available for high quantity
applications
Real-time digital voice encryption with
user-programmable 16-bit encryption keys
External voice data routing option
Programmable instant voice capture – eliminating ‘PTT’ clipping
Voice storage and retrieval with ‘step back’ feature
Packet data with user-programmable packet data size
Flexible 256 address programming
Late entry operation, provides optimum
performance in fading conditions
Small 48-pin LQFP/VQFN package options
Audio Signal
Input
Audio Signal
Output
CMX7011 Digital Voice Processor
Digital
Gain
Control
Audio
Codec
Digital
Filters
Vocoder
Air Interface
Voice Data Coding
Packet Data Coding
Real-time Encryption
Audio-band
Data Modem
Voice Storage/Retrieval
Registers and Control Interface
Microcontroller
Optional
Serial Flash
Power
2013 CML Microsystems Plc
1 page  
Digital Voice Processor
CMX7011
This is Provisional Information; changes and additions may be made to this specification. Parameters
marked TBD or left blank will be included in later issues. Items that are highlighted or greyed out should
be ignored. These will be clarified in later issues of this document. Information in this provisional
document should not be relied upon for final product design.
2013 CML Microsystems Plc
5
D/7011_FI1.x/6
5 Page 
Digital Voice Processor
CMX7011
5 PCB Layout Guidelines and Power Supply Decoupling
Analogue Ground
IOVDD
DVDD
C9 C5
DVSS
DVSS
AVDD
C7
AVDD
C14 C4
AVSS
AVDD
AVSS
VBIAS
VSSREF
AVDD
AVSS
VSSPA
VDDPA
C10
VDDPA
48 47 46 45 44 43 42 41 40 39 38 37
1 36
2 35
3 34
4 33
5 CMX7011Q3 32
6
7
CMX7011L4
31
30
8 29
9 28
10 27
11 26
12 25
13 14 15 16 17 18 19 20 21 22 23 24
IOVDD
IOVDD
DVSS
IOVDD
IOVDD
C12
DVSS
C8
DVDD
+ C11
DVSS
IOVDD
DVSS
C6
Digital Ground
Figure 3 CMX7011 Power Supply and De-coupling
Component values as per Figure 3.
Notes:
It is important to protect the analogue pins from extraneous inband noise and to minimise the impedance
between the CMX7011 and the power supply and bias de-coupling capacitors. The de-coupling capacitors
C4, C5, C6, C7, C8, C9, C10, C11, C12 and C14 should be as close as possible to the CMX7011. It is
therefore recommended that the printed circuit board is laid out with separate ground planes for the AVSS
and (digital) VSS supplies in the area of the CMX7011, with provision to make links between them close
to the CMX7011. The use of a multi-layer printed circuit board will facilitate the provision of ground planes
on separate layers, e.g. for use with VQFN packages.
On the CMX7011, VBIAS is used as an internal reference for detecting and generating the various
analogue signals. It must be carefully decoupled, to ensure its integrity, so apart from the decoupling
capacitor shown, no other loads should be connected. If VBIAS needs to be used to set an external mid-
point reference, it must be buffered with a high input impedance buffer.
2013 CML Microsystems Plc
11
D/7011_FI1.x/6
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CMX7011.PDF ] | |
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