TLV320AIC21 datasheet(39/56 Pages) TI1

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TLV320AIC20, TLV320AIC21

TLV320AIC24, TLV320AIC25

TLV320AIC20K, TLV320AIC24K

SLAS363D – MARCH 2002 – REVISED APRIL 2005

Control Register 2 Bit Summary (continued)

RESET

BIT

NAME

FUNCTION

VALUE

GPO

General-purpose output

Host port control bits. Write the following values into D1-D0 to select the appropriate configuration for two

pins SDA and SCL. The SDA and SCL pins are used for I2C interface if D1-D0 = 00. The SDA and SCL pins

D1-D0

HPC

are used for S2C interface if D1-D0 = 01. If D1-D0 = 10, the SDA pin = D2, input going into the SCL pin is

output to DOUT (11), the SDA pin = control frame flag.

Control Register 3A(1)

PWDN

SWRS

ASRF

R/W

R/W/S

R/W

(1)

NOTE: R = Read, W = Write

Control Register 3A Bit Summary

RESET

BIT

NAME

FUNCTION

VALUE

Power down PWDN = 00

No power down PWDN = 01

D5-D4

PWDN

Power-down A/DPWDN = 10

Power-down D/APWDN = 11

Software power down the entire device

SWRS

Software reset. Set this bit to 1 to reset the device.

Asynchronous sampling rate factor. These three bits define the ratio n between FS frequency and the

desired sampling frequency fs (Applied only if different sampling rate between CODEC1 and CODEC2 is

desired)

ASRF = 001, n = FS/fs = 1

ASRF = 010, n = FS/fs = 2

D2-D0

ASRF

001

ASRF = 011, n = FS/fs = 3

ASRF = 100, n = FS/fs = 4

ASRF = 101, n = FS/fs = 5

ASRF = 110, n = FS/fs = 6

ASRF = 111, n = FS/fs = 7

ASRF = 000, n = FS/fs = 8

Control Register 3B(1)

8KBF

Reserved

MHNS

MHDS

MLDO

MSPK

R/W

R/W/S

(1)

NOTE: R = Read, W = Write

Control Register 3B Bit Summary

RESET

BIT

NAME

FUNCTION

VALUE

8 kHz band pass filter. Set this bit to 1 to enable the band-bass filter [300 Hz -3.3 kHz] with the sampling

8KBF

rate at 8 kHz.

Reserved

Mute handset. This bit controls the MUTE function of handset output driver.

MHNS

MHNS = 0 Handset output driver is not MUTE.

MHNS = 1 Handset output driver is MUTE.

Mute headset. This bit controls the MUTE function of headset output driver.

MHDS

MHDS = 0 Headset output driver is not MUTE.

MHDS = 1 Headset output driver is MUTE.

Mute line output. This bit controls the MUTE function of the 600-

Ω output driver.

MLNO

MLNO = 0 The 600-

Ω output driver is not MUTE.

MLNO = 1 The 600-

Ω output driver is MUTE.

Mute 8-

Ω speaker. This bit controls the MUTE function of the 8-Ω speaker driver.

MSPK

MSPK = 0 The 8-

Ω speaker driver is not MUTE.

MSPK = 1 The 8-

Ω speaker driver is MUTE.

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