CMX869 View Datasheet(PDF) - CML Microsystems Plc
Part Name
Description
MFG CO.
'CMX869' PDF : 46 Pages View PDF
Low Power V.32 bis Modem
CMX869
QAM Modem Status Register b6-4: Signal to Noise
b6 b5 b4
1
1
1 Very good; could increase rate or retrain
1
1
0 Good
1
0
1 Normal
1
0
0 Poor
0
1
1 Bad; receiver will have a high error rate
0
1
0 Really bad; should decrease data rate or retrain
0
0
1 Unused
0
0
0 SNR not yet determined
QAM Modem Status Register b3-0: Operating Mode
b3 b2 b1 b0
1
1
1
1 14400 bps V.32 bis
1
1
1
0 12000 bps V.32 bis
1
1
0
1 9600 bps V.32 / V.32 bis (with Trellis coding)
1
1
0
0 9600 bps V.32 (no Trellis coding)
1
0
1
1 7200 bps V.32 bis
1
0
1
0 4800 bps V.32 / V.32 bis
1
0
0
1 2400 bps V.22 bis
1
0
0
0 1200 bps V.22 / V.22 bis
0
1
1
1 Unused
0
1
1
0 Unused
0
1
0
1 Unused
0
1
0
0 Training / Rate negotiation
0
0
1
1 Transmitting 2100Hz answer tone
0
0
1
0 Tx silence, Rx idle
0
0
0
1 Tx idle, Rx waiting
0
0
0
0 Idle
An update to the Messages status (b15 – b10) or any change in SNR or Mode status (b6 – b0) will cause
b9 of the main Status Register to be set to 1.
© 2003 CML Microsystems Plc
34
D/869/1
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