AK4642VN Datasheet, PDF (69/82 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Stereo CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4642]
ίϯτϩʔϧγʔέϯε
„ ΫϩοΫͷઃఆ
ADC·ͨ͸DACΛPower-up࣌ʹ͸ΫϩοΫ͕͞څڙΕ͍ͯΔඞཁ͕͋Γ·͢ɻ
1. PLLϚελϞʔυͷ৔߹
Power Supply
PDN pin
PMVCM bit
(Addr:00H, D6)
MCKO bit
(Addr:01H, D1)
PMPLL bit
(Addr:01H, D0)
MCKI pin
M/S bit
(Addr:01H, D3)
BICK pin
LRCK pin
MCKO pin
(1)
(2) (3)
(4)
Example:
Audio I/F Format: MSB justified (ADC & DAC)
BICK frequency at Master Mode: 64fs
Input Master Clock Select at PLL Mode: 11.2896MHz
MCKO: Enable
Sampling Frequency: 44.1kHz
(1) Power Supply & PDN pin = “L” Æ “H”
(5)
Input
40msec(max)
40msec(max)
(7)
(6)
Output
(8)
Output
(2)Addr:01H, Data:08H
Addr:04H, Data:4AH
Addr:05H, Data:27H
(3)Addr:00H, Data:40H
(4)Addr:01H, Data:0BH
MCKO, BICK and LRCK output
Figure 46. Clock Set Up Sequence (1)
<खॱྫ>
(1) ޙ্ཱ͛ͪݯిɺPDN pin “L” Æ “H”
͜ͷ۠ؒ͸AK4642ͷϦηοτͷͨΊɺ150nsҎ্ͷ “L”͕۠ؒඞཁͰ͢ɻ
(2) ͜ͷ۠ؒʹɺDIF1-0, PLL3-0, FS3-0, BCKO, M/S bitsͷઃఆΛߦͬͯԼ͍͞ɻ
(3) VCOMͷύϫʔΞοϓ: PMVCM bit = “0” Æ “1”
֤ϒϩοΫΛ্ཱͪ͛Δલʹ࠷ॳʹVCOMΛ্ཱͪ͛ͯԼ͍͞ɻ
(4) MCKOग़ྗΛ࢖༻͢Δ৔߹: MCKO bit = “1”
MCKOग़ྗΛ࢖༻͠ͳ͍৔߹: MCKO bit = “0”
(5) PMPLL bit͕ “0” Æ “1”ʹͳΓɺMCKI pinʹΫϩοΫ͕͞څڙΕͨޙɺPLLಈ࡞͕ελʔτ͠·͢ɻ
PLLͷϩοΫ࣌ؒ͸40ms(max)Ͱ͢ɻ
(6) PLL͕҆ఆޙɺBICK, LRCKΛग़ྗ࢝͠Ίɺਖ਼ৗͳಈ࡞͕։࢝͠·͢ɻ
(7) MCKO bit = “1”ͷ৔߹ɺ͜ͷ۠ؒͰ͸MCKO pin͔Βਖ਼ৗͰͳ͍ΫϩοΫ͕ग़ྗ͞Ε·͢ɻ
(8) MCKO bit = “1”ͷ৔߹ɺPLL͕҆ఆޙMCKO pin͔Βਖ਼ৗͳΫϩοΫ͕ग़ྗ͞Ε·͢ɻ
MS0358-J-02
- 69 -
2005/04