CMX860 查看數據表（PDF） - CML Microsystems Plc

零件编号

产品描述 (功能)

生产厂家

CMX860

Telephone Signalling Transceiver

CML Microsystems Plc 

Telephone Signalling Transceiver / Least Cost Router

CMX860

1.5.12.3

Transmit Mode Register

Transmit Mode Register: 16-bit write-only. 'C-BUS' address $E1

This register controls the CMX860 transmit signal type and level. All bits of this register are cleared to 0

by a General Reset command, or when b7 (Reset) of the General Control Register is 1.

Bit: 15 14 13 12

Tx mode = modem

Tx mode = DTMF/Tones

Tx mode = Disabled

11 10 9

Tx level

Tx level

8

7

set to 00

6

5

set to 00

Unused, set to 0000

Set to 0000 0000 0000

4

3

2

1

0

Start-stop /

# data bits /

synch data synch data source

DTMF or Tone select

Tx Mode Register b15-12: Tx mode

These 4 bits select the transmit operating mode.

b15 b14 b13 b12

0 1 0 1 V.23 FSK

0 1 0 0 V.23 FSK

0 0 1 1 Bell 202 FSK

0 0 1 0 Bell 202 FSK

0 0 0 1 DTMF / Tones

0 0 0 0 Transmitter disabled

1200 bps

75 bps

1200 bps

150 bps

Tx Mode Register b11-9: Tx level

These 3 bits set the gain of the Tx Level Control block.

b11 b10 b9

1

1

1

0dB

1

1

0 -1.5dB

1

0

1 -3.0dB

1

0

0 -4.5dB

0

1

1 -6.0dB

0

1

0 -7.5dB

0

0

1 -9.0dB

0

0

0 -10.5dB

© 2002 Consumer Microcircuits Limited

23

D/860/5

Share Link: