AK4955 Datasheet, PDF (73/117 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP/ LDO & DSP

[AK4955]
1. RAM Writing Timing during RUN
Use this operation to rewrite CRAM during RUN. After inputting the assigned command code (8-bit) to select the
number of data from 2 to 12, input the Starting Address of write (16-bit all 0) and the number of data assigned by
command code in this order (write preparation). Upon completion of this operation, execute RAM write during RUN
by inputting the corresponding command code and address (16-bit all 0) in this order (write execution).
CSN
CCLK
CDTIO
don’tcare Command
(L/H)
Address DATA
DATA
DATA
E.g. When # of DATA is 3
dummy
CRAM Command 0xF2
don’tcare
(L/H)
RDY(Internal)
CRAM 0xF1(# of DATA 2) ~ 0xFB (DATA number 12)
Figure 64. CRAM Write Preparation
MS1343-E-00
- 73 -
2011/12