參數(shù)資料
型號(hào)： AK4536VN
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： 16-Bit Mono CODEC with ALC & MIC/SPK-AMP
中文描述： 16位單聲道編解碼器ALC的
文件頁數(shù)： 47/59頁
文件大小： 403K
代理商： AK4536VN
ASAHI KASEI
[AK4536]
MS0174-E-00
2002/09
- 47 -
Addr
09H
Register Name
Input PGA Control
Default
D7
0
0
D6
D5
D4
D3
D2
D1
D0
IPGA6
0
IPGA5
0
IPGA4
1
IPGA3
0
IPGA2
0
IPGA1
0
IPGA0
0
IPGA6-0: Input Analog PGA (see Table 32)
Default: “10H” (0dB)
During the ALC1 operation, the writing value in IPGA6-0 bits is ignored.
In a manual mode, IPGA can be set to any values in Table 32.The ZTM1-0 bits set zero crossing timeout period
when IPGA value is changed. When the control register is written from the
μ
P, the zero crossing counter is reset
and its counter starts. When the signal zero crossing or zero crossing timeout, the written value from the
μ
P
becomes valid.
DATA (HEX)
GAIN (dB)
47
+27.5
46
+27.0
45
+26.5
36
+19.0
10
+0.0
06
5.0
05
5.5
04
6.0
03
6.5
02
7.0
01
7.5
00
8.0
Table 32. Input Gain Setting
Addr
Register Name
D7
D6
0AH
Digital Volume Control
DVOL7
DVOL6
DVOL5
Default
0
0
DVOL7-0: Output Digital Volume (see Table 33)
The AK4536 has a digital output volume (256 levels, 0.5dB step, Mute). The gain can be set by the DVOL7-0
bits. The volume is included in front of a DAC block, a input data of DAC is changed from +12 to –115dB with
MUTE. This volume has a soft transition function. It takes 1061/fs (=133ms @ fs = 8kHz) from 00H to FFH.
DVOL7-0
00H
01H
02H
18H
FDH
FEH
FFH
Table 33. Digital Volume Code Table
STEP
Default
0.5dB
D5
D4
D3
D2
D1
D0
DVOL4
1
DVOL3
1
DVOL2
0
DVOL1
0
DVOL0
0
0
Gain
+12.0dB
+11.5dB
+11.0dB
0dB
114.5dB
115.0dB
MUTE (
∞
)
Default
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