AK5701 Datasheet, PDF (50/62 Pages) Asahi Kasei Microsystems – PLL & MIC-AMP 16-Bit Stereo ADC

ASAHI KASEI
[AK5701]
ίϯτϩʔϧγʔέϯε
„ ΫϩοΫͷઃఆ
ADCΛPower-up࣌ʹ͸ΫϩοΫ͕͞څڙΕ͍ͯΔඞཁ͕͋Γ·͢ɻ
1. PLLϚελϞʔυͷ৔߹
Power Supply
PDN pin
PMVCM bit
(Addr:10H, D2)
MCKO bit
(Addr:16H, D2)
PMPLL bit
(Addr:11H, D0)
MCKI pin
M/S bit
(Addr:11H, D1)
BCLK pin
LRCK pin
MCKO pin
(1)
(2) (3)
(4)
(5)
Input
40msec(max)
40msec(max)
(7)
(6)
Output
(8)
Output
Example:
Audio I/F Format: I2S
BCLK 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”
(2)Addr:11H, Data:12H
Addr:14H, Data:23H
Addr:15H, Data:2FH
(3)Addr:10H, Data:04H
(4)Addr:16H, Data:04H
Addr:11H, Data:13H
MCKO, BCLK and LRCK output
Figure 45. Clock Set Up Sequence (1)
<खॱྫ>
(1) ޙ্ཱ͛ͪݯిɺPDN pin “L” Æ “H”
͜ͷ۠ؒ͸AK5701ͷϦηοτͷͨΊɺ150nsҎ্ͷ “L”͕۠ؒඞཁͰ͢ɻ
(2) ͜ͷ۠ؒʹɺDIF1-0, PLL3-0, FS3-0, BCKO1-0, M/S bitsͷઃఆΛ࣍ͷॱ൪ͷͱ͓ΓߦͬͯԼ͍͞ɻ
(2a) M/S bit = “1” , PLL3-0, FS3-0, BCKO1-0ͷઃఆ
(2b) DIF1-0ͷઃఆɻ
(3) VCOMͷύϫʔΞοϓ: PMVCM bit = “0” Æ “1”
֤ϒϩοΫΛ্ཱͪ͛Δલʹ࠷ॳʹVCOMΛ্ཱͪ͛ͯԼ͍͞ɻ
(4) MCKOग़ྗΛ࢖༻͢Δ৔߹: MCKO bit = “1”
MCKOग़ྗΛ࢖༻͠ͳ͍৔߹: MCKO bit = “0”
(5) PMPLL bit = “0” Æ “1”Λઃఆ͠ɺMCKI pinʹΫϩοΫ͕͞څڙΕͨޙɺPLLಈ࡞͕ελʔτ͠·͢ɻ
PLLͷϩοΫ࣌ؒ͸MCKI=12MHzͷͱ͖40ms(max)Ͱ͢(Table 4)ɻ
(6) PLL͕҆ఆޙɺBCLK, LRCKΛग़ྗ࢝͠Ίɺਖ਼ৗͳಈ࡞͕։࢝͠·͢ɻ
(7) MCKO bit = “1”ͷ৔߹ɺ͜ͷ۠ؒͰ͸MCKO pin͔Βਖ਼ৗͰͳ͍ΫϩοΫ͕ग़ྗ͞Ε·͢ɻ
(8) MCKO bit = “1”ͷ৔߹ɺPLL͕҆ఆޙMCKO pin͔Βਖ਼ৗͳΫϩοΫ͕ग़ྗ͞Ε·͢ɻ
MS0404-J-00
- 50 -
2005/08