CS44L11 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
CS44L11 Datasheet PDF : 34 Pages
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CS44L11
DC-blocking capacitor during power transients. On power transitions, the output will quickly change to the
bias point; however, if the DC-blocking capacitor still has a full charge, as in short power cycles, the tran-
sition will be very small, often inaudible. Refer to Section 6.4.
4.1.4
Ramp-Up Bypass (RUPBYP)
Default = 0
0 - Normal
1 - Bypass
Function:
When in normal mode, the duty cycle of the output PWM signal is increased at a rate determined by the
Ramp Speed variable (RMP_SPx). Normal mode is used in Single-Ended applications to reduce pops in
the output caused by the DC-blocking capacitor. When the ramp-up function is bypassed in Single-Ended
applications, there will be an abrupt change in the output signal. Refer to Section 6.4.
4.1.5
Ramp-Down Bypass (RDNBYP)
Default = 0
0 - Disabled
1 - Enabled
Function:
When in normal mode, the duty cycle of the output PWM signal is decreased at a rate determined by the
Ramp Speed variable (RMP_SPx). Normal mode is used in Single-Ended applications to reduce pops in
the output caused by the DC-blocking capacitor and changes in bias conditions. When the ramp-down
function is bypassed in Single-Ended applications, there will be an abrupt change in the output signal.
Refer to Section 6.4.
4.2 Channel A Volume Control (address 03h) (VOLA)
4.3 Channel B Volume Control (address 04h) (VOLB)
7
VOLx7
0
6
VOLx6
0
5
VOLx5
0
4
VOLx4
0
3
VOLx3
0
2
VOLx2
0
1
VOLx1
0
0
VOLx0
0
Default = 0 dB (No attenuation)
Function:
The Volume Control registers allow independent control of the signal levels in 1 dB increments from +18 to
-96 dB. Volume settings are decoded using a 2’s complement code, as shown in Table 2. The volume
changes are implemented as dictated by the Soft and Zero Cross bits. All volume settings less than -96 dB
are equivalent to muting the channel via the ATAPI bits (see Section 4.8.2).
Note:
All volume settings greater than +18 dB are interpreted as +18 dB.
Binary Code
Decimal Value
Volume Setting
00001100
12
+12 dB
00000111
7
+7 dB
00000000
0
0 dB
11000100
-60
-60 dB
10100110
-90
-90 dB
Table 2. Example Volume Settings
14
DS640PP4
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