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參數(shù)資料
| 型號： | AK4537VN |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 16-Bit ツヒ Stereo CODEC with MIC/HP/SPK-AMP |
| 中文描述： | 16位ツヒ立體聲編解碼器與麥克風/惠普/胰腎聯(lián)合移植腺苷 |
| 文件頁數(shù)： | 67/76頁 |
| 文件大小： | 576K |
| 代理商： | AK4537VN |
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ASAHI KASEI
[AK4537]
MS0202-E-04
2005/04
- 67 -
Headphone-amp Output
FS2-0 bits
(Addr:05H, D7-5)
ATTL7-0 bits
(Addr:0CH 0DH, D7-0)
HPL/R bit
(Addr:03H, D1-0)
PMHPL/R bits
(Addr:01H, D2-1)
HPL/R pins
XXX
000
0000000
XXXXXXX
Normal Output
External Mute
(1)
BST1-0 bits
(Addr:06H, D3-2)
00
XX
00
(2)
(3)
(7)
(8)
(12)
PMDAC bit
(Addr:01H, D0)
(4)
(11)
(5)
(9)
(6)
(10)
E xam p le :
X ’tal and P LL are used.
S am pling Frequency : 44.1kH z
D A T T C bit = “1”(default)
B ass B o o st Level : M iddle
D e-em phases respo nse : O FF
(1 ) A d d r:0 5 H , D ata:0 0 H
(3 ) A d d r:0 C H , D ata 1 0 H
(4 ) A d d r:0 1 H , D ata 6 1 H
(7 ) R elease extern al M u te
P layb ack
(2 ) A d d r:0 6 H , D ata 1 9 H
(8 ) E n ab le extern al M u te
(9 ) A d d r:0 1 H , D ata 6 1 H
(1 0 ) A d d r:0 2 H , D ata 8 3 H
(5 ) A d d r:0 2 H , D ata 8 0 H
(6 ) A d d r:0 1 H , D ata 6 7 H
(1 1 ) A d d r:0 1 H , D ata 6 0 H
(1 2 ) A d d r:0 6 H , D ata 1 1 H
Figure 55. Headphone-Amp Output Sequence
<Example>
At first, clocks should be supplied according to “Clock Set Up” sequence.
(1) Set up a sampling frequency (FS2-0 bits) if PLL mode is used.
(2) Set up the low frequency boost level(BST1-0 bits)
(3) Set up the digital volume(Addr : 0CH and 0DH)
At DATTC bit = “1”(default), ATTL7-0 bits of Address 0CH control both Lch and Rch attenuation level.
(4) Power up DAC : PMDAC bit = “0”
→
“1”
(5) Power up headphone-amp : HPL bit = HPR bit = “1”
→
“0”
Output voltage of headphone-amp is still HVSS.
(6) Rise up the common voltage of headphone-amp : PMHPL bit = PMHPR bit = “0”
→
“1”
The rising time after power up Headphone-amp depends on the capacitor value connected with the MUTET
pin. When this capacitor value is 1.0
μ
F, the time constant is
τ
r
= 100ms(typ), 250ms(max).
(7) Release the external mute.
(8) Enable the external mute.
(9) Fall down the common voltage of headphone-amp : PMHPL bit = PMHPR bit = “1”
→
“0”
The rising time after power up Headphone-amp depends on the capacitor value connected with the MUTET
pin. When this capacitor value is 1.0
μ
F, the time constant is
τ
f
= 100ms(typ), 250ms(max).
If the power supply is powered off or Headphone-Amp is powered-down before the common voltage goes to
GND, some POP noise occurs. It takes 2times of
τ
f
that the common voltage goes to GND.
(10) Power down headphone-amp : HPL bit = HPR bit = “0”
→
“1”
(11) Power down DAC : PMDAC bit = “1”
→
“0”
(12) Off the low frequency boost level (BST1-0 bits = “00”)
相關PDF資料 |
PDF描述 |
|---|---|
| AK4538 | 16Bit DS CODEC with MIC/HP/SPK-AMP |
| AK4538VN | 16Bit DS CODEC with MIC/HP/SPK-AMP |
| AK4541VQ | AC’97 Rev 2.1 Multimedia Audio CODEC |
| AK4541 | AC’97 Rev 2.1 Multimedia Audio CODEC |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AK4537VNP-L | 制造商:AKM Semiconductor Inc 功能描述:AK4537VNP-L |
| AK4538 | 制造商:AKM 制造商全稱:AKM 功能描述:16Bit DS CODEC with MIC/HP/SPK-AMP |
| AK4538VN | 制造商:AKM 制造商全稱:AKM 功能描述:16Bit DS CODEC with MIC/HP/SPK-AMP |
| AK4541 | 制造商:AKM 制造商全稱:AKM 功能描述:AC’97 Rev 2.1 Multimedia Audio CODEC |
| AK4541VQ | 制造商:AKM 制造商全稱:AKM 功能描述:AC’97 Rev 2.1 Multimedia Audio CODEC |
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