參數(shù)資料
型號(hào)： AK4368EG
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： DAC with built-in PLL & HP-AMP
中文描述： DAC，帶有內(nèi)置的鎖相環(huán)
文件頁(yè)數(shù)： 29/60頁(yè)
文件大?。?/td> 817K
代理商： AK4368EG
ASAHI KASEI
[AK4368EG]
MS0529-E-00
2006/07
- 29 -
De-emphasis Filter
The AK4368 includes a digital de-emphasis filter (tc = 50/15
μ
s), using an IIR filter corresponding to three sampling
frequencies (32kHz, 44.1kHz and 48kHz). The de-emphasis filter is enabled by setting DEM1-0 bits (Table 19).
DEM1 bit
DEM0 bit
0
0
0
1
1
0
1
1
Table 19. De-emphasis Filter Frequency Select
Bass Boost Function
By controlling the BST1-0 bits, a low frequency boost signal can be output from DAC. The setting value is common for
both channels (Table 20).
BST1 bit
BST0 bit
0
0
0
1
1
0
1
1
Table 20. Low Frequency Boost Select
Mixing Function
MONO1-0 bits select the digital data mixing for the DAC (Table 21).
MONO1 bit
MONO0 bit
0
0
0
1
1
0
1
1
(L+R)/2
Table 21. Mixer Setting
System Reset
The AK4368 should be reset once by bringing PDN pin “L” upon power-up. After exiting reset, VCOM, DAC, HPL,
HPR, LOUT and ROUT switch to the power-down state. The contents of the control register are maintained until the reset
is completed.
The DAC exits reset and power down states by MCKI after the PMDAC bit is changed to “1”. The DAC is in power-down
mode until MCKI is input.
De-emphasis
44.1kHz
OFF
48kHz
32kHz
Default
BOOST
OFF
MIN
MID
MAX
Default
Lch
L
L
R
Rch
R
L
R
(L+R)/2
Default
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