BU26156RFS Datasheet, PDF (72/95 Pages) Rohm – Monoraul MIC Input with ALC

BU26156RFS
Datasheet
Playback ALC Attack Time Control Register
MAPCON
INDEX
b07
b06
b05
b04
b03
b02
b01
b00
R
W
(Initial)
0x0
0xdc 0xdd
-
-
-
-
PALCATK
-
-
-
-
0
1
0
0
This register is to set the attack time that is the step period for the playback ALC volume down.
PALCATK[3:0]
These bits are to set the playback ALC attack time. The playback ALC volume downs step by step per this attack time period.
Attack time is in proportion to sampling frequency(fs) as following table.
setting
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xA
0xB
0xC
0xD
0xE
0xF
fs equivalent
1/fs
2/fs
4/fs
8/fs
16/fs
32/fs
64/fs
128/fs
256/fs
512/fs
1024/fs
2048/fs
4096/fs
8192/fs
16384/fs
32768/fs
Time(fs=48kHz)
20.8us
41.7us
83.3us
167us
333us
667us
1.33ms
2.67ms
5.33ms
10.7ms
21.3ms
42.7ms
85.3ms
171ms
341ms
683ms
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TSZ22111・15・001
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TSZ02201-0V1V0E502570-1-2
Jul.1.2014 Rev.001