AK7750 Datasheet, PDF (65/77 Pages) Asahi Kasei Microsystems – Audio DSP with Built-in Hands-Free Phone Features

[ASAHI KASEI]
[AK7750]
b) SO Read Out
SO can output data that is on the DSP Data Bus (DBUS).
Data is set using the @ MICR command and specifying a value in the DST field.
When the data is set, DRDY becomes “H” and data is output in sync with the falling edge of SCLK.
By setting SI to “H”, DRDY becomes “L” and waits for the next instruction.
Once DRDY becomes “H”, the @ MICR instruction data that sets DRDY “H” is retained until SI is set to “H”
or until 24 bits of data are output by SCLK clock (DRDY becomes “L” after outputting 24 data bits), and no
further @MICR instruction is accepted. Output on SO pins is 24-bits long maximum.
S_RESET =H
RQ =H
SI
@MICR
DRDY
SCLK
SO
Data1
Data2
24SCLK
DDDDD
23 22 21 20 19
DDD
210
less than SCLK24
DDDDDDDD
23 22 21 20 19 18 17 16
SO Read Out (during RUN)
[MS0296-E-00]
65
2005/03