Telephone Signalling Transceiver / Least Cost Router
CMX860
CONTENTS
Section
1.0
1.1
1.2
1.3
1.4
Page
Features and Applications .................................................................. 3
Brief Description.................................................................................. 3
Block Diagram ..................................................................................... 5
Signal List ............................................................................................ 6
External Components.......................................................................... 8
1.4.1 Ring Detector Interface......................................................... 10
1.4.2 Hook Detector Interface ........................................................ 11
1.4.5 RESETN pin........................................................................... 11
General Description........................................................................... 12
1.5.1 Tx USART .............................................................................. 13
1.5.2 FSK Modulator ...................................................................... 14
1.5.3 Tx Filter and Equaliser.......................................................... 14
1.5.4 DTMF/Tones Generator ........................................................ 14
1.5.5 Tx Level Control and Output Drivers ................................... 14
1.5.6 DTMF Decoder and Tone Detectors..................................... 15
1.5.7 Rx Modem Filter and Equaliser ............................................ 16
1.5.8 FSK Demodulator.................................................................. 16
1.5.9 Rx Data Register and USART ............................................... 16
1.5.10 Rx Modem Pattern Detectors................................................ 18
1.5.11 Analogue Signal Routing ..................................................... 18
1.5.12 'C-BUS' Interface ................................................................... 19
1.5.12.1
General Reset Command.............................. 19
1.5.12.2
General Control Register.............................. 21
1.5.12.3
Transmit Mode Register ............................... 23
1.5.12.4
Receive Mode Register ................................. 26
1.5.12.5
Tx Data Register............................................ 28
1.5.12.6
Rx Data Register ........................................... 28
1.5.12.7
Analogue Signal Path Register .................... 29
1.5.12.8
Status Register.............................................. 30
1.5.12.9
Programming Register.................................. 33
1.5.12.10
Other Registers ............................................. 35
Application Notes .............................................................................. 36
Performance Specification................................................................ 37
1.7.1 Electrical Performance.......................................................... 37
1.7.1.1 Absolute Maximum Ratings..................................... 37
1.7.1.2 Operating Limits....................................................... 37
1.7.1.3 Operating Characteristics ........................................ 38
1.5
1.6
1.7
©
2002 Consumer Microcircuits Limited
4
D/860/5
CMLMICRO [ CML MICROCIRCUITS ]
