CS4351
6.2.2 DE-EMPHASIS CONTROL (DEM1:0) BITS 3-2.
Gain
dB
Default = 0
00 - No De-emphasis
01 - 44.1 kHz De-emphasis
10 - 48 kHz De-emphasis
11 - 32 kHz De-emphasis
T1=50 µs
0dB
T2 = 15 µs
Frequency
-10dB
Function:
Selects the appropriate digital filter to maintain the stan-
dard 15 µs/50 µs digital de-emphasis filter response at
32, 44.1 or 48 kHz sample rates. (see Figure 11)
F1
3.183 kHz
F2
10.61 kHz
Figure 11. De-Emphasis Curve
Note: De-emphasis is only available in Single Speed Mode
6.2.3 FUNCTIONAL MODE (FM) BITS 1-0
Default = 00
00 - Auto speed mode detect
01 - Single-Speed Mode (4 to 50 kHz sample rates)
10 - Double-Speed Mode (50 to 100 kHz sample rates)
11 - Quad-Speed Mode (100 to 200 kHz sample rates)
Function:
Selects the required range of input sample rates or DSD Mode.
6.3
Volume Mixing and Inversion Control - Register 03h
B7
VOLB=A
0
B6
INVERT A
0
B5
INVERT B
0
B4
Reserved
0
B3
ATAPI3
1
B2
ATAPI2
0
B1
ATAPI1
0
B0
ATAPI0
1
6.3.1 CHANNEL A VOLUME = CHANNEL B VOLUME (VOLB=A) BIT 7
Function:
When set to 0 (default) the AOUTA and AOUTB volume levels are independently controlled by the A and
the B Channel Volume Control Bytes.
When set to 1 the volume on both AOUTA and AOUTB are determined by the A Channel Attenuation and
Volume Control Bytes, and the B Channel Bytes are ignored.
6.3.2 INVERT SIGNAL POLARITY (INVERT_A) BIT 6
Function:
When set to 1, this bit inverts the signal polarity of channel A.
When set to 0 (default), this function is disabled.
DS566PP2
29
CIRRUS [ CIRRUS LOGIC ]
