CMX860 查看數據表（PDF） - MX-COM Inc

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产品描述 (功能)

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CMX860

Telephone Signaling Transceiver

MX-COM Inc  

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

0001

0000

V.23 FSK

1200bps

V.23 FSK

75bps

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

¤2000 MX-COM, Inc.

www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054

Doc. # 20480222.001

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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