cs43l43 Cirrus Logic, Inc., cs43l43 Datasheet - Page 21

• Manufacturer Part Number: cs43l43
• Description: Low-voltage Stereo D/a Converter With Headphone Amplifier
• Manufacturer: Cirrus Logic, Inc.

5.8 LIMITER ATTACK RATE (ADDRESS 08H) (ARATE)
5.9 LIMITER RELEASE RATE (ADDRESS 09H) (RRATE)
DS479PP3
RRATE7
ARATE7
Binary Code
Binary Code
Function:
Function:
7
0
7
0
00000001
00010100
00101000
01011010
00000001
00010100
00101000
01011010
00111100
00111100
Default = 10h - 2 LRCK’s per 1/8 dB
The limiter attack rate is user selectable. The rate is a function of sampling frequency, Fs, and the value
in the Limiter Attack Rate register. Rates are calculated using the function RATE = 32/{value}. Where
{value} is the decimal value in the Limiter Attack Rate register and RATE is in LRCK’s per 1/8 dB of
change. NOTE: A value of zero in this register is not recommended, as it will induce erratic behavior of
the limiter. Use the LIM_EN bit to disable the limiter function (see Section 5.10.3).
Default = 20h - 16 LRCK’s per 1/8 dB
The limiter release rate is user-selectable. The rate is a function of sampling frequency, Fs, and the value
in Limiter Release Rate register. Rates are calculated using the function RATE = 512/{value}. Where {val-
ue} is the decimal value in the Limiter Release Rate register and RATE is in LRCK’s per 1/8 dB of change.
NOTE: A value of zero in this register is not recommended, as it will induce erratic behavior of the limiter.
Use the LIM_EN bit to disable the limiter function (see Section 5.10.3).
Table 12. Example Limiter Release Rate Settings
Table 11. Example Limiter Attack Rate Settings
RRATE6
ARATE6
6
0
6
0
Decimal Value
Decimal Value
RRATE5
ARATE5
20
40
60
90
20
40
60
90
1
1
5
0
5
1
RRATE4
ARATE4
LRCK’s per 1/8 dB
LRCK’s per 1/8 dB
4
1
4
0
0.356
0.53
512
1.6
0.8
32
25
12
8
5
RRATE3
ARATE3
3
0
3
0
RRATE2
ARATE2
2
0
2
0
RRATE1
ARATE1
1
0
1
0
CS43L43
RRATE0
ARATE0
0
0
0
0
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