Datasheet

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Mode Control Registers (PCM1772)
User-Programmable Mode Controls
Register Map
PCM1772 , PCM1773
SLES010G – SEPTEMBER 2001 – REVISED MARCH 2007
The PCM1772 device has a number of user-programmable functions that can be accessed via mode control
registers. The registers are programmed using the serial control interface, as discussed in the Software Control
(PCM1772) section. Table 6 lists the available mode control functions, along with their reset default conditions
and associated register index.
Table 7 shows the mode control register map. Each register includes an index (or address) indicated by the
IDX[6:0] bits.
Table 6. User-Programmable Mode Controls
FUNCTION RESET DEFAULT REGISTER NO. BIT(S)
Soft mute control, L/R independently Disabled 01 MUTL, MUTR
Digital attenuation level setting, 0 dB to –62 dB in 1-dB steps, L/R 0 dB 01, 02 ATL[5:0], ATR[5:0]
independently
Oversampling rate control (128 f
S
, 192 f
S
, 256 f
S
, 384 f
S
) 128 f
S
oversampling 03 OVER
Polarity control for analog output for R-channel DAC Not inverted 03 RINV
Analog mixing control for analog in, AIN (terminal 14) Disabled 03 AMIX
44.1-kHz de-emphasis control Disabled 03 DEM
Audio data format select 24-bit, left-justified format 03 FMT[2:0]
Zero cross attenuation Disabled 04 ZCAT
Power-down control Disabled 04 PWRD
Table 7. Mode Control Register Map
Register IDX B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
[6:0]
(B14-
B8)
Register 01 01h 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 MUTR MUTL ATL5 ATL4 ATL3 ATL2 ATL1 ATL0
Register 02 02h 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV
(1)
RSV
(1)
ATR5 ATR4 ATR3 ATR2 ATR1 ATR0
Register 03 03h 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 OVER RSV
(1)
RINV AMIX DEM FMT2 FMT1 FMT0
Register 04 04h 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV
(1)
RSV
(1)
RSV
(1)
ZCAT RSV
(1)
RSV
(1)
RSV
(1)
PWRD
(1) RSV: Reserved for test operation. It must be set to 0 during regular operation.
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