Table 5. dac de-emphasis, Table 6. receiver de-emphasis – Cirrus Logic CS42518 User Manual
Page 48
48
DS584F2
CS42518
Receiver Mode Control (address 1Eh) register to set the appropriate sample rate.
6.4.5
RECEIVER DE-EMPHASIS CONTROL (RCVR_DEM)
Default = 0
Function:
When enabled, de-emphasis will be automatically applied when emphasis is detected based on the
channel status bits. The appropriate digital filter will be selected to maintain the standard 15
s/50s
digital de-emphasis filter response at the auto-detected sample rate of either 32, 44.1, or 48 kHz. If
the FRC_PLL_LK bit is set to a ‘1’b, then the auto-detect sample rate feature is disabled. To apply
the correct de-emphasis filter, use the DE-EMPH bits in the Receiver Mode Control (address 1Eh)
register to set the appropriate sample rate.
DAC_DEM
reg03h[1]
FRC_PLL_LK
reg06h[0]
DE-EMPH[1:0]
reg1Eh[5:4]
De-Emphasis
Mode
0
X
XX
No De-Emphasis
1
0
XX
Auto-Detect Fs
1
1
00
01
10
11
Reserved
32 kHz
44.1 kHz
48 kHz
Table 5. DAC De-Emphasis
RCVR_DEM
reg03h[0]
FRC_PLL_LK
reg06h[0]
DE-EMPH[1:0]
reg1Eh[5:4]
De-Emphasis
Mode
0
X
XX
No De-Emphasis
1
0
XX
Auto-Detect Fs
1
1
00
01
10
11
Reserved
32 kHz
44.1 kHz
48 kHz
Table 6. Receiver De-Emphasis