Datasheet

Register 19
R/W
0 0
1
0 0 1
1
REV
ATS1 ATS0
OPE
RSV
DMFS FLT
INZD
B15
B14 B13
B12
B11 B10 B9
B8
B7
B6 B5
B4
B3
B2 B1
B0
PCM1795
SLES248 – MAY 2009 ........................................................................................................................................................................................................ www.ti.com
The FMT[2:0] bits are used to select the data format for the serial audio interface.
For the external digital filter interface mode (DFTH mode), this register is operated as shown in the Application
for External Digital Filter Interface section.
DMF[1:0]: Sampling Frequency Selection for the De-Emphasis Function
These bits are available for read and write.
Default value: 00
DMF[1:0] De-Emphasis Sampling Frequency Selection
00 Disabled (default)
01 48 kHz
10 44.1 kHz
11 32 kHz
The DMF[1:0] bits are used to select the sampling frequency used by the digital de-emphasis function when it is
enabled by setting the DME bit. The de-emphasis curves are shown in the Typical Characteristics section.
For the DSD mode, analog FIR filter performance can be selected using this register. A register map and filter
response plots are shown in the Application For DSD Format (DSD Mode) Interface section.
DME: Digital De-Emphasis Control
This bit is available for read and write.
Default value: 0
DME De-Emphasis Setting
DME = 0 De-emphasis disabled (default)
DME = 1 De-emphasis enabled
The DME bit is used to enable or disable the de-emphasis function for both channels.
MUTE: Soft Mute Control
This bit is available for read and write.
Default value: 0
MUTE Soft Mute Setting
MUTE = 0 Soft mute disabled (default)
MUTE = 1 Soft mute enabled
The MUTE bit is used to enable or disable the soft mute function for both channels.
Soft mute is operated as a 256-step attenuator. The speed for each step to – ∞ dB (mute) is determined by the
attenuation rate selected in the ATS register.
R/ W: Read/Write Mode Select
When R/ W = 0, a write operation is performed.
When R/ W = 1, a read operation is performed.
Default value: 0
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