73K324L-28IH データシートの表示（PDF） - Teridian Semiconductor Corporation

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73K324L-28IH

CCITT V.22bis,V.23,V.22,V.21,Bell 212A Single-Chip Modem

Teridian Semiconductor Corporation 

73K324L

CCITT V.22bis,V.23,V.22,V.21, Bell 212A

Single-Chip Modem

DATA SHEET

TONE REGISTER (continued)

D7

D6

D5

D4

D3

D2

D1

D0

TR

RXD

TRANSMIT TRANSMIT TRANSMIT DTMF 3 DTMF 2/ DTMF 1/

DTMF 0/

011 OUTPUT

GUARD/

ANSWER

DTMF

WIRE

OVER-

GUARD/

CONTR. CALLING/SCT

TONE

FDX

SPEED CALLING/SCT

TONE

TONE SEL

BIT NO.

D3, D2,

D1, D0

D7

NAME

DTMF 3, 2,

1, 0

RXD Output

Control

CONDITION

D4 = 1

0

1

DESCRIPTION

Programs 1 of 16 DTMF tone pairs that will be D1, D02,

1, 0 transmitted when TX DTMF and TX enable bit (CR0,

bit D1) is set. Tone encoding is shown below:

KEYBOARD

DTMF CODE

TONES

EQUIVALENT D3 D2 D1 D0 LOW HIGH

1

0 0 0 1 697 1209

2

0 0 1 0 697 1336

3

0 0 1 1 697 1477

4

0 1 0 0 770 1209

5

0 1 0 1 770 1336

6

0 1 1 0 770 1477

7

0 1 1 1 852 1209

8

1 0 0 0 852 1336

9

1 0 0 1 852 1477

0

1 0 1 0 941 1336

*

1 0 1 1 941 1209

#

1 1 0 0 941 1477

A

1 1 0 1 697 1633

B

1 1 1 0 770 1633

C

1 1 1 1 852 1633

D

0 0 0 0 941 1633

Enables RXD pin. Receive data will be output on RXD.

Disables RXD pin. The RXD pin reverts to a high

impedance with internal weak pull-up resistor.

Page: 13 of 30

© 2005, 2008 TERIDIAN Semiconductor Corporation

Rev 7.1

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