AK4645AEZ Datasheet, PDF (83/85 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP

[AK4645A]
■ ΫϩοΫͷఀࢭ
ADC͓ΑͼDACΛ࢖༻͠ͳ͍৔߹͸ɺϚελΫϩοΫΛఀࢭ͢Δ͜ͱ͕Ͱ͖·͢ɻ
1. ֎෦ΫϩοΫεϨʔϒϞʔυͷ৔߹
(1)
External MCKI
Input
External BICK
(1)
Input
External LRCK
(1)
Input
Example
Audio I/F Format: MSB justified (ADC & DAC)
Input MCKI frequency: 1024fs
Sampling Frequency: 44.1kHz
(1) Stop the external clocks
Figure 74. Clock Stopping Sequence (4)
<खॱྫ>
(1) ֎෦ΫϩοΫΛࢭΊͯԼ͍͞ɻ
2. ֎෦ΫϩοΫϚελϞʔυͷ৔߹
(1)
External MCKI
Input
BICK
Output
LRCK
Output
"H" or "L"
"H" or "L"
Example
Audio I/F Format: MSB justified (ADC & DAC)
Input MCKI frequency: 1024fs
Sampling Frequency: 44.1kHz
(1) Stop the external MCKI
Figure 75. Clock Stopping Sequence (5)
<खॱྫ>
(1) MCKIΛࢭΊͯԼ͍͞ɻBICK͓ΑͼLRCK͸ “H”·ͨ͸ “L”ݻʹఆ͞Ε·͢ɻ
■ ύϫʔμ΢ϯ
֤ϒϩοΫΛύϫʔμ΢ϯ͠ɺ֤ΫϩοΫఀࢭ͔ͭPMVCM bit = “0”ͱ͢Δ͜ͱͰిྲྀΛγϟοτμ΢ϯ(typ.
20μA)Ͱ͖·͢ɻ·ͨɺ֤ΫϩοΫఀࢭ͔ͭPDN pin = “L”ͱ͢Δ͜ͱͰిྲྀΛγϟοτμ΢ϯ(typ. 1μA)͢Δ
͜ͱ΋ՄೳͰ͢ɻୠ͠ɺ͜ͷ৔߹Ϩδελ͕ॳظԽ͞Ε·͢ɻ
MS0986-J-00
- 83 -
2008/07