AK5701 Datasheet, PDF (51/62 Pages) Asahi Kasei Microsystems – PLL & MIC-AMP 16-Bit Stereo ADC

ASAHI KASEI
[AK5701]
2. PLLεϨʔϒϞʔυͰ֎෦ΫϩοΫ(EXLRCK or EXBCLK pin)Λ࢖༻͢Δ৔߹
Power Supply
PDN pin
PMVCM bit
(Addr:10H, D2)
PMPLL bit
(Addr:11H, D0)
EXLRCK pin
EXBCLK pin
Internal Clock
(1)
(2) (3)
Example:
Audio I/F Format : I2S
PLL Reference clock: EXBCLK
EXBCLK frequency: 64fs
Sampling Frequency: 44.1kHz
4f₍s₁o₎ f_{Power Supply & PDN pin = “L” Æ “H”}
(2) Addr:11H, Data:0CH
Addr:14H, Data:23H
Addr:15H, Data:2FH
Input
(4)
(3) Addr:10H, Data:04H
(5)
Figure 46. Clock Set Up Sequence (2)
(4) Addr:11H, Data:0DH
<खॱྫ>
(1)ޙ্ཱ͛ͪݯిɺPDN pin “L” Æ “H”
͜ͷ۠ؒ͸AK5701ͷϦηοτͷͨΊɺ150nsҎ্ͷ “L”͕۠ؒඞཁͰ͢ɻ
(2)͜ͷ۠ؒʹɺDIF1-0, FS3-0, PLL3-0 bitsͷઃఆΛߦͬͯԼ͍͞ɻ
(3)VCOMͷύϫʔΞοϓ: PMVCM bit = “0” Æ “1”
֤ϒϩοΫΛ্ཱͪ͛Δલʹ࠷ॳʹVCOMΛ্ཱͪ͛ͯԼ͍͞ɻ
(4)PMPLL bit = “0” Æ “1”Λઃఆ͠ɺPLLج४ΫϩοΫ(EXLRCK or EXBCLK pin)͞څڙ͕ΕͨޙɺPLL
ಈ࡞͕ελʔτ͠·͢ɻPLLͷϩοΫ࣌ؒ͸EXLRCK͕PLLج४ΫϩοΫೖྗͷ৔߹ɺ160ms(max),
EXBCLK͕PLLج४ΫϩοΫͰVCOC pinͷ֎෇͚͕10k+4.7nFͷ৔߹ɺ2ms(max)Ͱ͢(Table 4)ɻ
(5) PLL͕҆ఆޙɺਖ਼ৗͳಈ࡞͕։࢝͠·͢ɻ
MS0404-J-00
- 51 -
2005/08