Datasheet

DAMS: Digital Attenuation Mode Select
AZRO[1:0]: Zero-Flag Channel-Combination Select
ZERO[8:1]: Zero-Detect Status (Read-Only, I
2
C Interface Only)
PCM1680
www.ti.com .................................................................................................................................................. SLES133B – MARCH 2005 – REVISED OCTOBER 2008
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.
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Product Folder Link(s): PCM1680