73K224L-28IH/F 查看數據表（PDF） - Teridian Semiconductor Corporation

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73K224L-28IH/F

V.22bis, V.22, V.21, Bell 212A, 103 Single-Chip Modem

Teridian Semiconductor Corporation 

73K224L

V.22bis, V.22, V.21, Bell 212A, 103

Single-Chip Modem

DATA SHEET

TONE REGISTER (continued)

D7

TR

RXD

011 OUTPUT

CONTR.

BIT NO.

D6

TRANSMIT

GUARD

TONE

NAME

D5

Transmit

Answer Tone

D6

Transmit

Guard Tone

D7

RXD Output

Control

D5

D4

D3

D2

D1

D0

TRANSMIT

ANSWER

TONE

TRANSMIT

DTMF

DTMF 3

DTMF 2/4

WIRE FDX

DTMF 1/

EXTENDED

OVER- SPEED

DTMF 0/

ANSWER/

GUARD

CONDITION

DESCRIPTION

D5 D4 D0

D5 interacts with bits D4 and D0 as shown. Also interacts

with DR bit D2 in originate mode. See Detect Register

description.

0 0 X Disables answer tone generator.

100

In answer mode, a Bell 2225 Hz tone is transmitted

continuously when the Transmit Enable bit is set.

1 0 1 Likewise, a CCITT 2100 Hz answer tone is transmitted.

0

Disables guard tone generator.

1

Enables guard tone generator. (See D0 for selection of

guard tones.) Bit D4 must be zero.

0

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

1

Disables RXD pin. The RXD pin reverts to a high

impedance with internal weak pull-up resistor.

CONTROL REGISTER 2

D7

D6

CR2

100

0

SPEC REG

ACCESS

BIT NO.

D0

NAME

Equalizer

Enable

D1

Train Inhibit

D2

RESET DSP

D3

16 Way

D5

CALL INIT

D4

TRANSMIT

S1

D3

16 WAY

D2

RESET

DSP

D1

TRAIN

INHIBIT

D0

EQUALIZER

ENABLE

CONDITION DESCRIPTION

0

The adaptive equalizer is in its initialized state.

1

The adaptive equalizer is enabled. This bit is used in

handshakes to control when the equalizer should calculate

its coefficients.

0

The adaptive equalizer is active.

1

The adaptive equalizer coefficients are frozen.

0

The DSP is inactive and all variables are initialized.

1

The DSP is running based on the mode set by other control

bits

0

The receiver and transmitter are using the same decision

plane (based on the Modulator Control Mode).

1

The receiver, independent of the transmitter, is forced into a

16 point decision plane. Used for QAM handshaking.

Page: 14 of 31

© 2005, 2008 TERIDIAN Semiconductor Corporation

Rev 7.1

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