AK7746 Datasheet, PDF (46/62 Pages) Asahi Kasei Microsystems – Audio DSP with 5-channel 24-bit ADC and Input Mux

[ASAHI KASEI]
[AK7746]
d) Offset RAM writes (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 000D12****D8 D7****D1D0
Fig.8-20 Input of data into OFRAM
S_RESET
RQ
SCLK
SI
RDY
SO
10010000
00 A5***A0 000D12***D0
10010000
00 A5***A0 000D12***D0
Fig.8-21 Input of discontinuous address data into OFRAM
[MS0369-E00]
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2004/12