BU26156RFS Datasheet, PDF (76/95 Pages) Rohm – Monoraul MIC Input with ALC

BU26156RFS
Playback ALC ZeroCross TimeOut Register
MAPCON
INDEX
b07
b06
b05
b04
b03
b02
R
W
(Initial)
0x0
0xe6 0xe7
-
-
-
-
-
-
-
-
-
-
-
-
PALCZCTM[1:0]
This register is to set the value of Zero Cross time out in Playback ALC.
setting
fs equivalent
Time(fs=48kHz)
0x0
128/fs
0x1
256/fs
2.67ms
5.33ms
0x2
512/fs
0x3
1024/fs
10.7ms
21.3ms
b01
b00
PALCZCTM
0
0
Datasheet
Playback Limiter Fast Release Setting Register
MAPCON
0x0
INDEX
R
W
0xea 0xeb
b07
(Initial)
0
b06
b05
PALCFRTH
0
0
b04
b03
b02
PALCFREN
-
1
0
-
b01
b00
PALCFRSP
0
1
This register is to set the fast release in Playback ALC.
PALCFREN
This is to set the Fast Release enable in Playback ALC.
setting
Description
0 Disable
1 Enable
PALCFRSP[1:0]
These bits are to set the release speed in Playback ALC.
Release speed is expressed with PALCDCY.
setting
Release Speed
0x0 (1 / 4) * PALCDCY
0x1 (1 / 8) * PALCDCY
0x2 (1 / 16) * PALCDCY
0x3 (1 / 32) * PALCDCY
PALCFRTH[3:0]
This bit can set the threshold in Fast Release (Playback ALC).
Whether to make Fast Release effective by the gain down in which extent.
setting
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
Threshold
(1Step=0.375dB)
13step = 4.875dB
15step = 5.625dB
16step = 6.000dB
17step = 6.375dB
19step = 7.125dB
20step = 7.500dB
21step = 7.875dB
23step = 8.625dB
setting
0x8
0x9
0xA
0xB
0xC
0xD
0xE
0xF
Threshold
(1Step=0.375dB)
24step = 9.000dB
25step = 9.375dB
27step = 10.125dB
28step = 10.500dB
29step = 10.875dB
31step = 11.625dB
32step = 12.000dB
33step = 12.375dB
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TSZ22111・15・001
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TSZ02201-0V1V0E502570-1-2
Jul.1.2014 Rev.001