CS4341 Datasheet, PDF (19/36 Pages) Cirrus Logic – 24-Bit, 96 kHz Stereo DAC with Volume Control

CS4341
Soft Ramp and Zero Cross Enable
Soft Ramp and Zero Cross Enable dictates that signal level changes, either by attenuation changes
or muting, will occur in 1/8 dB steps and be implemented on a signal zero crossing. The 1/8 dB level
change will occur after a timeout period between 512 and 1024 sample periods (10.7 ms to 21.3 ms
at 48 kHz sample rate) if the signal does not encounter a zero crossing. The zero cross function is
indepently monitored and implemented for each channel.
SOFT
0
0
1
1
ZERO
0
1
0
1
Mode
Changes to affect immediately
Zero Cross enabled
Soft Ramp enabled
Soft Ramp and Zero Cross enabled
Table 8. Soft Ramp and Zero Cross Enable
4.9 ATAPI CHANNEL MIXING AND MUTING
Volume and Mixing Control Register (address 02h)
7
A=B
6
5
4
3
Soft
Zero Cross
ATAPI4
ATAPI3
Access:
R/W in I²C and write only in SPI.
2
ATAPI2
1
ATAPI1
0
ATAPI0
Default:
01001 - AOUTA=aL, AOUTB=bR (Stereo)
Function:
The CS4341 implements the channel mixing functions of the ATAPI CD-ROM specification. Refer to
Table 9 and Figure 28 for additional information.
ATAPI4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
ATAPI3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
ATAPI2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
ATAPI1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
ATAPI0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
AOUTA
MUTE
MUTE
MUTE
MUTE
aR
aR
aR
aR
aL
aL
aL
aL
a[(L+R)/2]
a[(L+R)/2]
a[(L+R)/2]
a[(L+R)/2]
MUTE
MUTE
Table 9. ATAPI Decode
AOUTB
MUTE
bR
bL
b[(L+R)/2]
MUTE
bR
bL
b[(L+R)/2]
MUTE
bR
bL
b[(L+R)/2]
MUTE
bR
bL
b[(L+R)/2]
MUTE
bR
DS298PP2
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