參數(shù)資料
型號: AK4648
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: Stereo CODEC with MIC/HP/SPK-AMP
中文描述: 立體聲編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 43/119頁
文件大?。?/td> 1272K
代理商: AK4648
[AK4648]
MS0625-E-01
2007/06
- 43 -
LRCK
BICK(32fs)
SDTO(o)
SDTI(i)
0
15 14
15 14
1
10
2 3
7
7 6 5 4 3 2 1 0
6 5 4 3
1 0
2
9
11 12 13 14 15 0 1 2 3
15 14
1
0
7 6 5 4 3 2 1 0
10
9
11 12 13 14 15
BICK(64fs)
0 1
16
2 3
17 18
31 0 1 2 3
1
0
16 17 18
31
SDTO(o)
SDTI(i)
15 14
Don't Care
2
15
1
15
15
15
Don't Care
15:MSB, 0:LSB
Lch Data
Rch Data
14
2 1
14
2 1
8
8
8
0
0
0
0
0
15 14
7 6 5 4 3 2 1 0
8
15 14
2 1 0
Figure 30. Mode 3 Timing
Mono/Stereo Mode
PMADL, PMADR and MIX bits set mono/stereo ADC operation. When MIX bit = “1”, EQ and FIL3 bits should be set to
“0”. ALC operation (ALC bit = “1”) or digital volume operation (ALC bit = “0”) is applied to the data in Table 19.
PMADL bit
PMADR bit
MIX bit
ADC Lch data
0
0
x
0
1
x
Rch Input Signal
1
0
x
Lch Input Signal
0
Lch Input Signal
1
1
1
Table 19. Mono/Stereo ADC operation (x: Don’t care)
Digital High Pass Filter
The ADC has a digital high pass filter for DC offset cancellation. The cut-off frequency of the HPF is 0.9Hz
(@fs=44.1kHz) and scales with sampling rate (fs). When PMADL bit = “1” or PMADR bit = “1”, the HPF of ADC is
enabled but the HPF of DAC is disabled. When PMADL=PMADR bits = “0”, PMDAC bit = “1”, the HPF of DAC is
enabled but the HPF of ADC is disabled.
ADC Rch data
All “0”
Rch Input Signal
Lch Input Signal
Rch Input Signal
(L+R)/2
(default)
All “0”
(L+R)/2
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