AK7740ET Datasheet, PDF (41/48 Pages) Asahi Kasei Microsystems – 24bit 2ch ADC + 24bit 4ch DAC with Audio DSP

[ASAHI KASEI]
[AK7740ET]
7-3-c) External conditional jump code rewrite (during RUN phase)
Data comprising a set of two bytes is used to write the external conditional jump code. Data can be input during both
the reset and operation phases, and input data is set to the specified register at the rising edge of LRCLK. When all
data has been transferred, the RDY terminal goes to "L". Upon completion of writing, it goes to "H". A jump
command will be executed if there is any one agreement between each bit of the 8-bit external condition code and
"1"of each bit of the IFCON field. A write operation from the microcontroller is disabled until RDY goes to "H".
Note: The LRCLK phase is inverted in the I²S-compatible mode.
Data transfer procedure
c Command code C4h ( 1 1 0 0 0 1 0 0 )
d Code data
(D7 . . . . . D0)
max 1LRCLK
S_RESET
SCLK
SI
11000100 D7 *** D0
SO
RQ
LRCLK
RDY
max 2LRCLK
L ch R ch
max0.25LRCLK
External condition jump write timing (during RUN phase)
<Pre-E-01>
- 41 -
2006/10