CMX860D6 Просмотр технического описания (PDF) - MX-COM Inc
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CMX860D6 Datasheet PDF : 38 Pages
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Telephone Signaling Transceiver
20
CMX860 Advance Information
4.12.4 Receive Mode Register: 16-bit write-only ($E2)
This register controls the CMX860 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 Set to 00 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
Bit 15-12
These 4 bits select the receive operating mode.
b15 b14 b13 b12
0101
0100
0011
0010
0001
0000
V.23 FSK 1200bps
V.23 FSK 75bps
Bell 202
1200bps
Bell 202
150bps
DTMF, Programmed tone pair, Answer Tone, Call Progress
detect
Receiver disabled
Rx Level
Bit 11-9
These three bits set the gain of the Rx Gain Control block.
b11 b10 b9
1
1
1
1
1
0
1
0
1
1
0
0
0
1
1
0
1
0
0
0
1
0
0
0
0dB
-1.5dB
-3.0dB
-4.5dB
-6.0dB
-7.5dB
-9.0dB
-10.5dB
Reserved
Bit 8-6
Rx USART
Setting (both
FSK modes)
Bit 5-3
Reserved, set to 000
These three bits select the Rx USART operating mode.
b5 b4 b3
1 1 1 Rx Synchronous mode
1 1 0 Rx Start-stop mode
0 x x Rx USART function disabled
Rx Data Bits and
parity (FSK
Start-stop mode)
Bit 2-0
In Start-stop mode these three bits select the number of data bits (plus any parity bit) in each
received character.
b2 b1 b0
1 1 1 8 data bits + parity
1 1 0 8 data bits
1 0 1 7 data bits + parity
1 0 0 7 data bits
0 1 1 6 data bits + parity
0 1 0 6 data bits
0 0 1 5 data bits + parity
0 0 0 5 data bits
ã2000 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480222.002
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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