PCM1791A_09 Datasheet, PDF (43/61 Pages) Texas Instruments – AUDIO STEREO DIGITAL-TO-ANALOG CONVERTER

www.ti.com
DSD MODE CONFIGURATION AND FUNCTION CONTROLS
PCM1791A
SLES071B − MARCH 2003 − REVISED NOVEMBER 2006
Configuration for the DSD Interface Mode
DSD = 1 (Register 20, B5)
B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5
Register 16 R/W 0
0
1
0
0
0
0
−
−
−
Register 17 R/W 0
0
1
0
0
0
1
−
−
−
Register 18 R/W 0
0
1
0
0
1
0
−
−
−
Register 19 R/W 0
0
1
0
0
1
1 REV −
−
Register 20 R/W 0
0
1
0
1
0
0
− SRST 1
Register 21 R
0
0
1
0
1
0
1
−
−
−
Register 22 R
0
0
1
0
1
1
0
−
−
−
NOTE: −: Function is disabled. No operation even if data bit is set
DMF[1:0]: Analog FIR Performance Selection
Default value: 00
DMF[1:0]
00
01
10
11
Analog FIR Performance Select
FIR-1 (default)
FIR-2
FIR-3
FIR-4
B4
−
−
−
OPE
−
−
−
B3
B2
B1
B0
−
−
−
−
−
−
−
−
DMF1 DMF0 −
−
−
−
−
−
MONO − OS1 OS0
−
DZ1 DZ0
−
−
− ZFGR ZFGL
Plots for the four analog FIR filter responses are shown in the ANALOG FIR FILTER PERFORMANCE IN DSD
MODE section of this data sheet.
OS[1:0]: Analog-FIR Operation Speed Selection
Default value: 00
OS[1:0]
00
01
10
11
Operation Speed Select
f_DBCK (default)
f_DBCK/2
Reserved
f_DBCK/4
The OS bits in the DSD mode select the operating rate of the analog FIR. The OS bits must be set before setting
the DSD bit to 1.
43