3 mode select, 4 power down, Table 3 – Cirrus Logic CS4397 User Manual
Page 17: 3 mode select 3.4 power down, Cs4397
CS4397
DS333F1
17
3.3 MODE SELECT
Mode Control Register (address 01h)
Access:
R/W in I
2
C and SPI.
Default:
00000
Function:
The Mode Select pins determine the operational mode of the device as detailed in Tables 9-14. The op-
tions include:
Selection of the Digital Interface Format which determines the required relationship between the
Left/Right clock, serial clock and serial data as detailed in Figures 29-33
Selection of the standard 15
µs/50 µs digital de-emphasis filter response, Figure 28, which requires re-
configuration of the digital filter to maintain the proper filter response for 32, 44.1 or 48 kHz sample rates.
Selection of the appropriate clocking mode to match the input sample rates.
Access to the Direct Stream Digital Mode
Access to the 8x Interpolation Input Mode
3.4 POWER DOWN
Mode Control Register (address 01h)
Access:
R/W in I
2
C and SPI.
Default:
1 - Powered Down
Function:
The analog and digital sections will be placed into a power-down mode when this function is enabled. This
bit must be cleared to resume normal operation.
7
6
5
4
3
2
1
0
CAL
MUTE
M4
M3
M2
M1
M0
PDN
7
6
5
4
3
2
1
0
CAL
MUTE
M4
M3
M2
M1
M0
PDN
PDN
MODE
0
Disabled
1
Enabled
Table 3.