AK7714 Datasheet, PDF (40/48 Pages) Asahi Kasei Microsystems – 20-Bit Audio Codec with DSP and Delay RAM

[ASAHI KASEI]
[AK7714]
4) Read-out during RUN phase (SO output )
SO outputs data on DBUS (data bus) of the DSP section. Data is set when @MICR is specified by the DST field.
Setting of data allows DRDY to go to "H", and data is output synchronized with the falling edge of SCLK. When CS
goes to "H", DRDY goes to "L" to wait for the next command. Once DRDY goes to "H", the data of the last @MICR
command immediately before DRDY goes to "H" will be held until CS goes to "H", and subsequent commands will be
rejected.
A maximum of 24 bits are output from SO. After the required number of data (not exceeding 24 bits) is taken out by
SCLK, the next data can be output by setting CS to "H".
SO read (during RUN phase)
(7) ADC section high-pass filter
The AK7714 incorporates a digital high-pass filter (HPF) for cancelling the section DC offset in the ADC section. 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
48 kHz
0.93 Hz
44.1 kHz
0.86 Hz
32 kHz
0.62 Hz
M0018-E-00
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‘98/07