AK4955 Datasheet, PDF (75/117 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP/ LDO & DSP

3. MICR Reading Timing
[AK4955]
DSPSTBN bit
PMDSP bit
CSN
(control register setting is abbreviated)
CCLK
CDTIO
don’tcare
(L/H)
Command WAIT
DATA
DATA DATA
Figure 66. MICR Reading
DATA
DATA
don’tcare
(L/H)
There is a wait time (1byte) after command code and address inputs when reading MICR data. During this wait time, the
CDTIO pin is in output state and the output data is indefinite. MSB data is output on the first falling edge of CCLK after
the wait time.
Command Data Length
Description
70H
4byte
MICR1 Reading
71H
4byte
MICR2 Reading
72H
4byte
MICR3 Reading
73H
4byte
MICR4 Reading
Table 66. Command Code and Data Length when Reading MRCI
4. Written Data Reading Timing during RUN
DSPSTBN bit
PMDSP bit
CSN
(control register setting is abbreviated)
CCLK
CDTIO
don’tcare
(L/H)
Command WAIT
address address DATA DATA
Figure 67. Written Data Reading during RUN
DATA
don’tcare
(L/H)
There is a wait time (1byte) after command code and address inputs when reading CRAM written data. During this wait
time, the CDTIO pin is in output state and the output data is indefinite. MSB data is output on the first falling edge of
CCLK after the wait time.
Command Address
Length
FDH
2byte
Data
Description
Note
Length
2byte x n CRAM written data reading during RUN n=2~12
Table 67. Command Code and Data Length Reading during RUN
MS1343-E-00
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2011/12