AK4642VN Datasheet, PDF (70/82 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Stereo CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4642]
2. PLLεϨʔϒϞʔυͰ֎෦ΫϩοΫ(LRCK or BICK pin)Λ࢖༻͢Δ৔߹
Power Supply
PDN pin
PMVCM bit
(Addr:00H, D6)
PMPLL bit
(Addr:01H, D0)
LRCK pin
BICK pin
Internal Clock
(1)
(2) (3)
Input
(4)
Example:
Audio I/F Format : MSB justified (ADC & DAC)
PLL Reference clock: BICK
BICK frequency: 64fs
Sampling Frequency: 44.1kHz
4f₍s₁o₎ f_{Power Supply & PDN pin = “L” Æ “H”}
(2) Addr:04H, Data:32H
Addr:05H, Data:27H
(3) Addr:00H, Data:40H
(5)
Figure 47. Clock Set Up Sequence (2)
(4) Addr:01H, Data:01H
<खॱྫ>
(1)ޙ্ཱ͛ͪݯిɺPDN pin “L” Æ “H”
͜ͷ۠ؒ͸AK4642ͷϦηοτͷͨΊɺ150nsҎ্ͷ “L”͕۠ؒඞཁͰ͢ɻ
(2)͜ͷ۠ؒʹɺDIF1-0, FS3-0, PLL3-0 bitsͷઃఆΛߦͬͯԼ͍͞ɻ
(3)VCOMͷύϫʔΞοϓ: PMVCM bit = “0” Æ “1”
֤ϒϩοΫΛ্ཱͪ͛Δલʹ࠷ॳʹVCOMΛ্ཱͪ͛ͯԼ͍͞ɻ
(4)PMPLL bit͕ “0” Æ “1”ʹͳΓɺPLLج४ΫϩοΫ(LRCK or BICK pin)͞څڙ͕ΕͨޙɺPLLಈ࡞͕ε
λʔτ͠·͢ɻPLLͷϩοΫ࣌ؒ͸LRCK͕PLLج४ΫϩοΫೖྗͷ৔߹ɺ160ms(max), BICK͕PLL
ج४ΫϩοΫͷ৔߹ɺ2ms(max)Ͱ͢ɻ
(5) PLL͕҆ఆޙɺਖ਼ৗͳಈ࡞͕։࢝͠·͢ɻ
MS0358-J-02
- 70 -
2005/04