www.ti.com

DAMS: Digital Attenuation Mode Select

AZRO[1:0]: Zero-Flag Channel-Combination Select

PCM1680

SLES133 – MARCH 2005

B15

B14

B13

B12

B11

B10

B9

B8

B7

B6

B5

B4

B3

B2

B1

B0

REGISTER 13

0

IDX6

IDX5

IDX4

IDX3

IDX2

IDX1

IDX0

DAMS

AZRO1

AZRO0

RSV

RSV

RSV

RSV

RSV

Default value: 0

DAMS = 0

Fine step, 0.5 dB/step for 0 to –63 dB range (default)

DAMS = 1

Wide range, 1 dB/step for 0 to –100 dB range

The DAMS bit is used to select the digital attenuation mode.

Default value: 00b

AZRO[1:0]

Zero-Flag Channel-Combination Select

00

Combination A (ZERO1: DATA1 L-ch, ZERO2: DATA1 R-ch) (default)

01

Combination B (ZERO1: N/A, ZERO2: DATA1–DATA4)

10

Combination C (ZERO1: DATA4, ZERO2: DATA1–DATA3)

11

Combination D (ZERO1: DATA1, ZERO2: DATA2–DATA4)

The AZRO[1:0] bits are used to select the zero-flag channel combinations for ZERO1 and ZERO2.

B15

B14

B13

B12

B11

B10

B9

B8

B7

B6

B5

B4

B3

B2

B1

B0

REGISTER 14

0

IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0

ZERO8

ZERO7

ZERO6

ZERO5

ZERO4

ZERO3

ZERO2

ZERO1

Default value: N/A

The ZERO[8:1] bits show the status of zero detect for each channel. The status is set to 1 by detecting a zero

state without regard to the ZREV bit setting.

27