AK4645AEZ Datasheet, PDF (78/85 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP

[AK4645A]
ίϯτϩʔϧγʔέϯε
■ ΫϩοΫͷઃఆ
ADC·ͨ͸DACͷPower-up࣌ʹ͸ΫϩοΫ͕͞څڙΕ͍ͯΔඞཁ͕͋Γ·͢ɻ
1. 1. ֎෦ΫϩοΫϞʔυͰ࢖༻͢Δ৔߹(εϨʔϒϞʔυ)
Power Supply
PDN pin
PMVCM bit
(Addr:00H, D6)
MCKI pin
LRCK pin
BICK pin
(1)
(2) (3)
(4)
Input
(4)
Input
Example:
Audio I/F Format: MSB justified (ADC and DAC)
Input MCKI frequency: 256fs
Sampling Frequency: 44.1kHz
(1) Power Supply & PDN pin = “L” Æ “H”
(2) Addr:04H, Data:02H
Addr:05H, Data:00H
(3) Addr:00H, Data:40H
MCKI, BICK and LRCK input
Figure 69. Clock Set Up Sequence (4)
<खॱྫ>
(1) ޙ্ཱ͛ͪݯిɺPDN pin “L” Æ “H”ʹ͍ͯͩ͘͠͞ɻ͜ͷ۠ؒ͸AK4645AͷϦηοτͷͨΊɺ150ns
Ҏ্ͷ “L”͕۠ؒඞཁͰ͢ɻ
ͨͩ͠ɺి্ཱ࣌͛ͪݯͷϔουϑΥϯग़ྗ͓ΑͼϥΠϯग़ྗͷϙοϓϊΠζΛճආ͢Δʹ͸ʮγ
εςϜઃ( ܭάϥϯυͱిݯͷσΧοϓϦϯά)ʯʹࡌهͷਪ঑γʔέϯεΛࢀরͯ͠ಈ࡞ͤͯ͘͞
͍ͩ͞ɻ
(2) ͜ͷ۠ؒʹɺDIF1-0, FS1-0 bitsͷઃఆΛߦͬͯԼ͍͞ɻ
(3) VCOMͷύϫʔΞοϓɿ PMVCM bit = “0” Æ “1”
֤ϒϩοΫΛ্ཱͪ͛Δલʹ࠷ॳʹVCOMΛ্ཱͪ͛ͯԼ͍͞ɻ
(4) MCKI, LRCK, BICKΫϩοΫೖྗޙɺਖ਼ৗͳಈ࡞͕։࢝͠·͢ɻ
MS0986-J-00
- 78 -
2008/07