Low Power V.32 bis Modem
CMX869
CONTENTS
Section
Page
1.
2.
3.
4.
Brief Description ..................................................................................... 1
Block Diagram......................................................................................... 3
Signal List................................................................................................ 4
External Components............................................................................. 6
4.1
4.2
4.3
Power Supply Connections....................................................... 7
Ring Detector Interface.............................................................. 8
Line Interface.............................................................................. 9
5.
General Description.............................................................................. 11
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
Tx USART.................................................................................. 12
FSK and QAM Modulators....................................................... 14
Tx Filter and Equaliser............................................................. 14
DTMF/Tone Generator ............................................................. 14
Tx Level Control and Output Buffer....................................... 14
Rx DTMF/Tones Detectors ...................................................... 14
Rx Modem Filterering and Demodulation.............................. 15
Rx Modem Pattern Detectors.................................................. 15
Rx USART ................................................................................. 15
6.
C-BUS Interface and Software Description ........................................ 18
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
General Reset Command ........................................................ 20
General Control Register......................................................... 20
Transmit Mode Register.......................................................... 22
Receive Mode Register............................................................ 25
QAM Modem Command Register........................................... 27
Tx Data Register....................................................................... 28
Rx Data Register ...................................................................... 29
Status Register......................................................................... 30
QAM Modem Status Register.................................................. 33
Programming Register ............................................................ 35
7.
8.
Application Notes.................................................................................. 38
Performance Specification................................................................... 39
8.1
Electrical Performance ............................................................ 39
8.1.2 Operating Limits.......................................................... 39
8.1.3 Operating Characteristics .......................................... 40
Packaging ................................................................................. 45
8.2
© 2004 CML Microsystems Plc
2
D/869/4
CMLMICRO [ CML MICROCIRCUITS ]
