AK7754 Datasheet, PDF (23/26 Pages) Asahi Kasei Microsystems – Audio DSP with Stereo CODEC + MIC/HP-AMP

■ Digital Microphone Interface
Input Interface
tDMCK
DMCLK
tDMCKR
tDMCKL
fDMCK = 1/tDMCK
dDMCK = 100 x tDMKL / tDMCK
Figure 10. DMCLK Clock Timing
tSFall
[AK7754]
65%DVDD
50%DVDD
35%DVDD
DMCLK
DMDAT
tDMDS
tDMDH
Figure 11. Audio Interface Timing, DCLKP bit = “1”)
50%DVDD
VIH3
VIL3
DMCLK
DMDAT
I²C Bus Interface
tDMDS
tDMDH
Figure 12. Audio Interface Timing, DCLKP bit = “0”)
50%DVDD
VIH3
VIL3
SDA
tBUF
tLOW tR
tHIGH tF
SCL
tHD:STA
Stop Start
tHD:DAT
tSU:DAT tSU:STA
Start
Figure 13. I²C Bus Interface
VIH
VIL
tSP
VIH
VIL
tSU:STO
Stop
MS1138-E-01-PB
- 23 -
2012/03