AK4631 Datasheet, PDF (57/69 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

ASAHI KASEI




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ADC, DAC, ALC1, ALC2, IPGA Λ࢖༻࣌ʹ͸ɺΫϩοΫ͕͞څڙΕ͍ͯΔඞཁ͕͋Γ·͢ɻ
1. PLL ϚελϞʔυͷ৔߹
[AK4631]
Power Supply
PDN pin
PMVCM bit
(Addr:00H, D6)
MCKPD bit
(Addr:01H, D2)
MCKO bit
(Addr:01H, D1)
PMPLL bit
(Addr:01H, D0)
MCKI pin
M/S bit
(Addr:01H, D3)
BICK pin
FCK pin
MCKO pin
(1)
(2) (3)
(4)
(5)
(6)
Input
40msec(max)
(7)
(8)
Output
1msec (max)
40msec(max)
(9)
(10)
Output
Example:
Audio I/F Format: DSP Mode, BCKP = MSBS = “0”
BICK frequency at Master Mode: 64fs
Input Master Clock Select at PLL Mode: 11.2896MHz
MCKO : Enable
Sampling Frequency:8kHz
(1) Power Supply & PDN pin = “L” Æ “H”
(2)Addr:01H, Data:0CH
Addr:04H, Data:48H
Addr:05H, Data:00H
(3)Addr:00H, Data:40H
(4)Addr:01H, Data:0BH
MCKO, BICK and FCK output
Figure 43. Clock Set Up Sequence (1)
<खॱྫ>
(1)ޙ্ཱ͛ͪݯిɺPDN pin “L” → “H”
(1)ͷ۠ؒ͸AK4631ͷϦηοτͷͨΊɺ150nsҎ্ͷ “L”͕۠ؒඞཁͰ͢ɻ
(2)͜ͷ۠ؒʹɺDIF1-0, PLL3-0, FS2-0, BCKO1-0, MSBS, BCKP, M/S bitͷઃఆΛߦͬͯԼ͍͞ɻ
(3)VCOMͷύϫʔΞοϓɿ PMVCM bit = “0” → “1”
֤ϒϩοΫΛ্ཱͪ͛Δલʹ࠷ॳʹVCOMΛ্ཱͪ͛ͯԼ͍͞ɻ
(4)MCKI pinͷϓϧμ΢ϯղআ : MCKPD bit = “1” → “0”
(5)MCKOग़ྗ Λ ࢖༻͢Δ৔߹: MCKO bit = “1”
MCKOग़ྗΛ࢖༻͠ͳ͍৔߹: MCKO bit = “0”
(6)PMPLL bit͕ “0” Æ “1”ʹͳΓɺMCKI pinʹΫϩοΫ͕͞څڙΕͨޙɺPLLಈ࡞͕ελʔτ͠·͢ɻPLLͷϩοΫ
࣌ؒ͸40ms(max)Ͱ͢ɻ
(7)PLL͕҆ఆޙɺBICK, FCK pinΛग़ྗ࢝͠Ίɺਖ਼ৗͳಈ࡞͕։࢝͠·͢ɻ
(8)͜ͷ۠ؒʹਖ਼ৗͰͳ͍प೾਺ͷFCK ͱBICKΫϩοΫ͕ग़ྗ͞Ε·͢ɻ
(9)͜ͷ۠ؒͰ͸ɺMCKO pin ͔Βਖ਼ৗͰͳ͍ΫϩοΫ͕ग़ྗ͞Ε·͢ɻ
(10) PLL͕҆ఆޙɺMCKO pin͔Βਖ਼ৗͳΫϩοΫ͕ग़ྗ͞Ε·͢ɻ
MS0317-J-01
- 57 -
2004/11