73K324BL-IH/F 查看數據表（PDF） - Teridian Semiconductor Corporation

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73K324BL-IH/F

CCITT V.22bis,V.23,V.22,V.21,Bell 212A Single-Chip Modem w/ Integrated Hybrid

Teridian Semiconductor Corporation 

73K324BL

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

Single-Chip Modem w/ Integrated Hybrid

DATA SHEET

CONTROL REGISTER 3

D7

D6

CR3 TXDALT TRI-STATE

101

TX/RXCLK

BIT

NAME

D3, D2,

D1,D0

Transmit

Attenuator

D4

Receive Gain

Boost

D5

OH

D6

Tri-state

TXCLK/RXCLK

D7

TXDALT

D5

D4

D3

D2

D1

D0

OH RECEIVE TRANSMIT TRANSMIT TRANSMIT TRANSMIT

BOOST ATTEN. 3 ATEN 2 ATTEN. 1 ATTEN. 0

ENABLE

CONDITION DESCRIPTION

D3 D2 D1 D0

0 0 0 0 Sets the attenuation level of the transmitted signal in 1

1 1 1 1 dB steps. The default (D3 - D0 = 0100) is for a transmit

level of -10 dBm0 on the line with the recommended

hybrid transmit gain. The total range is 16 dB.

0

18 dB receive front end boost is not used.

1

Boost is in the path. This boost does not change

reference levels. It is used to extend dynamic range by

compensating for internally generated noise when

receiving weak signals. The receive level detect signal

and knowledge of the hybrid and transmit attenuator

setting will determine when boost should be enabled.

0

Relay driver open.

1

Open drain driver pulling low.

0

TXCLK and RXCLK are driven.

1

TXCLK and RXCLK are tri-stated.

Special Register Alternate TX data source (see Special Register).

Bit D3=1

Page: 18 of 34

© 2005, 2008 TERIDIAN Semiconductor Corporation

Rev 6.1

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