PCM3003 datasheet(28/39 Pages) BURR-BROWN

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PROGRAM REGISTER 1

PROGRAM REGISTER 2

PCM3002

PCM3003

SBAS079A – OCTOBER 2000 – REVISED OCTOBER 2004

A[1:0]

Bits 10, 9: Register address

These bits define the address for register 0:

LDL

Bit 8: DAC attenuation data load control for left channel

This bit is used to set analog outputs of the left and right channels simultaneously. The output level

is controlled by AL[7:0] attenuation data when this bit is set to 1. When set to 0, the new attenuation

data is ignored, and the output level remains at the previous attenuation level. The LDR bit in

of the left and right channels are controlled simultaneously.

AL (7:0)

Bits 7–0: DAC attenuation data for left channel

AL7 and AL0 are the MSB and LSB, respectively. The attenuation level (ATT) is given by:

ATT = 20

× log

10 (AL[7:0]/256) [dB], except AL[7:0] = FFh

AL[7:0]

ATTENUATION LEVEL

00h

–

∞dB (mute)

01h

–48.16 dB

FEh

–0.07 dB

FFh

0 dB (default)

res:

Bits 15–11: Reserved

These bits are reserved and should be set to 0.

A[1:0]

Bits 10, 9: Register address

These bits define the address for register 1:

LDR

Bit 8: DAC attenuation data load control for right channel

This bit is used to set analog outputs of the left and right channels simultaneously. The output level

is controlled by AR[7:0] attenuation data when this bit is set to 1. When set to 0, the new

attenuation data is ignored, and the output level remains at the previous attenuation level. The LDL

bit in register 0 has the equivalent function as LDR. When either LDL or LDR is set to 1, the output

levels of the left and right channels are controlled simultaneously.

AR[7:0]

Bits 7–0: DAC attenuation data for right channel

AR7 and AR0 are the MSB and LSB, respectively.

ATT = 20

× log

10 (AR[7:0]/256) [dB], except AR[7:0] = FFh

AR[7:0]

ATTENUATION LEVEL

00h

–

∞dB (mute)

01h

–48.16 dB

FEh

–0.07 dB

FFh

0 dB (default)

res:

Bits 15–11: Reserved

These bits are reserved and should be set to 0.

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