Datasheet

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MODE CONTROL REGISTERS (PCM1780/82)
User-Programmable Mode Controls
Register Map
PCM1780 , PCM1781 , PCM1782
SLES132B MARCH 2005 REVISED AUGUST 2006
The PCM1780/82 includes a number of user-programmable functions, which are accessed via control registers.
The registers are programmed using the serial control interface, which was previously discussed in the Software
Control section of this data sheet. Table 5 lists the available mode control functions, along with their reset
default conditions and associated register index.
The mode control register map is shown in Table 6 . Each register includes an index (or address) indicated by
the IDX[6:0] bits.
Table 5. User-Programmable Mode Controls
FUNCTION RESET DEFAULT REGISTER BIT(S)
Digital attenuation control, 0 dB to –63 dB in 0.5-dB 0 dB, no attenuation 16 and 17 AT1[7:0], AT2[7:0]
steps
Soft mute control Mute disabled 18 MUT[2:0]
Oversampling rate control ×64, ×32, ×16 18 OVER
Soft reset control Reset disabled 18 SRST
DAC operation control DAC1 and DAC2 enabled 19 DAC[2:1]
De-emphasis function control De-emphasis disabled 19 DM12
De-emphasis sample rate selection 44.1 kHz 19 DMF[1:0]
Audio data format control 24-bit, left-justified 20 FMT[2:0]
Digital filter rolloff control Sharp rolloff 20 FLT
Digital attenuation mode select 0 to –63 dB, 0.5 dB/step 21 DAMS
Output phase select Normal Phase 22 DREV
Zero-flag polarity select High 22 ZREV
Zero-flag function select L-, R-channels independent 22 AZRO
Table 6. Mode Control Register Map
IDX REGIST
B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
(B8–B14) ER
10h 16 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 AT17 AT16 AT15 AT14 AT13 AT12 AT11 AT10
11h 17 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 AT27 AT26 AT25 AT24 AT23 AT22 AT21 AT20
12h 18 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 SRST OVER RSV RSV RSV RSV MUT2 MUT1
13h 19 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV DMF1 DMF0 DM12 RSV RSV DAC2 DAC1
14h 20 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV RSV FLT RSV RSV FMT2 FMT1 FMT0
15h 21 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV RSV RSV RSV RSV RSV RSV DAMS
16h 22 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV RSV RSV RSV 0 AZRO ZREV DREV
19
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