CMX865D2 CML Microcircuits, CMX865D2 Datasheet - Page 2

• Manufacturer Part Number: CMX865D2
• Description: FSK Modem and DTMF Codec
• Manufacturer: CML Microcircuits

FSK Modem and DTMF Codec
© 2005 CML Microsystems Plc
Section
It is always recommended that you check for the latest product datasheet version from the
Datasheets page of the CML website: [www.cmlmicro.com].
1.
2.
3.
4.
5.
6.
7.
Brief Description ..................................................................................... 1
Block Diagram ......................................................................................... 3
Signal List ................................................................................................ 4
External Components............................................................................. 5
4.1
4.2
General Description.............................................................................. 10
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
Application Notes ................................................................................. 32
Performance Specification................................................................... 33
7.1
7.2
Ring Detector Interface ............................................................. 6
Line Interface.............................................................................. 7
Tx USART.................................................................................. 11
FSK Modulator ......................................................................... 12
Tx Filter and Equaliser ............................................................ 12
DTMF/Tone Generator ............................................................. 12
Tx Level Control and Output Buffer....................................... 12
Rx DTMF/Tones Detectors ...................................................... 13
Rx Modem Filtering and Demodulation ................................. 14
Rx Modem Pattern Detectors.................................................. 14
Rx Data Register and USART ................................................. 15
C-BUS Interface........................................................................ 16
5.10.1 General Reset Command ........................................... 16
5.10.2 General Control Register ........................................... 18
5.10.3 Transmit Mode Register ............................................. 20
5.10.4 Receive Mode Register............................................... 23
5.10.5 Tx Data Register.......................................................... 25
5.10.6 Rx Data Register ......................................................... 25
5.10.7 Status Register............................................................ 26
5.10.8 Programming Register ............................................... 29
Electrical Performance ............................................................ 33
7.1.1
7.1.2
7.1.3
Packaging ................................................................................. 41
Absolute Maximum Ratings....................................... 33
Operating Limits ......................................................... 33
Operating Characteristics.......................................... 34
CONTENTS
2
Page
CMX865
D/865/3