AK7750 Datasheet, PDF (67/77 Pages) Asahi Kasei Microsystems – Audio DSP with Built-in Hands-Free Phone Features

[ASAHI KASEI]
3) CRC Check
RQ
SCLK
SI
SO
D(x)
1010000 000000A9 A7***A1 A0 D15*** D0
Rest of D(x)/G(x)
B6h
R(x)
The rest (D(x)/G(x))=R(x)
The rest of D(x)/G(x)=R(x) CRC Check example.
4) Example of the R(x) made from D(x).
Examples
1
2
3
D(X)
D6ABCDh
D2A5A5h
A855557777AAAA0000FFFFh
R(X)
1E51h
0C30h
2297h
[AK7750]
(8) ADC high-pass filter
The AK7750 incorporates a digital high-pass filter (HPF) for canceling DC offset in the ADC. The
HPF cut-off frequency is about 1 Hz (fs = 48 kHz). This cut-off frequency is proportional to the sampling
frequency (fs).
Cut-off frequency
48kHz
0.93Hz
44.1kHz
0.86Hz
32kHz
0.62Hz
8kHz
0.16Hz
[MS0296-E-00]
67
2005/03