AK7744VT Datasheet, PDF (34/50 Pages) Asahi Kasei Microsystems – 24bit 3ch ADC + 24bit 4ch DAC with Audio DSP

[ASAHI KASEI]
[AK7744]
7-1-d) Offset RAM write (during reset phase)
5 bytes of data are used to perform offset RAM write operations (during reset phase). When all data has been
transferred, the RDY terminal goes to "H". Upon completion of writing into the OFRAM, it goes to "H" to allow the
next data to be input. When writing to sequential addresses, input the data without a command code or address. To
write discontinuous data, shift the RQ terminal from "H" to "L" and then input the command code, address and data
in that order.
Data transfer procedure
c Command code 90h ( 1 0 0 1 0 0 0 0 )
d Address
( 0 0 A5 A4 .. . . A0 )
e Data
(0 0 0 0 0 0 0 0 )
f Data
(0 0 0 D12 D11 * * . D8 )
g Data
(D7 . . . . . . D0 )
S_RESET
RQ
SCLK
SI
RDY
SO
10010000 00A5****A0 00000000 _{00000D10* D8} D7****D1D0
Input of data into OFRAM
<MS0167-E-00>
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2002/10