CMX868E2 View Datasheet(PDF) - MX-COM Inc
Part Name
Description
MFG CO.
'CMX868E2' PDF : 43 Pages View PDF
Low Power V.22bis Modem
23
CMX868 Advance Information
4.10.4 Receive Mode Register
Receive Mode Register: 16-bit write-only. C-BUS address $E2
This register controls the CMX868 receive signal type and level.
All bits of this register are cleared to 0 by a General Reset command, in Powersave mode or when b7 (Reset)
of the General Control Register is 1.
Bit:
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
Rx mode = modem
Rx level
Eq Descramble Start-stop/Synch
No. of bits and
parity
Rx mode = Tones detect
Rx level
DTMF/Tones/Call Progress select
Rx mode = Disabled
Set to 0000 0000 0000
Rx Mode Register Bits 15-12: Rx mode
These 4 bits select the receive operating mode.
Bit 15
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
Bit 14
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
Bit 13
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
Bit 12
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
V.22bis 2400bps QAM
High band (Calling modem)
“
Low band (Answering modem)
V.22/Bell 212A 1200bps DPSK High band (Calling modem)
“
Low band (Answering modem)
V.22 600bps DPSK
High band (Calling modem)
“
Low band (Answering modem)
V.21 300bps FSK
High band (Calling modem)
“
Low band (Answering modem)
Bell 103 300bps FSK
High band (Calling modem)
“
Low band (Answering modem)
V.23 FSK
1200bps
“
75bps
Bell 202 FSK
1200bps
“
150bps
DTMF, Programmed tone pair, Answer Tone, Call Progress detect
Receiver disabled
Rx Mode Register b11-9: Rx level
These three bits set the gain of the Rx Gain Control block.
Bit 11
1
1
1
1
0
0
0
0
Bit 10
1
1
0
0
1
1
0
0
Bit 9
1
0
1
0
1
0
1
0
0dB
-1.5dB
-3.0dB
-4.5dB
-6.0dB
-7.5dB
-9.0dB
-10.5dB
¤2001 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480205.007
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
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