AK7755EN_16 Datasheet, PDF (72/109 Pages) Asahi Kasei Microsystems – DSP with Mono ADC Stereo CODEC + Mic/Lineout Amp

[AK7755]
2. Coefficient RAM (CRAM) Write Operation (RUN)
Execute
Write data
(1) COMMAND Code 0xA4
(2) ADDRESS1
00000000
(3) ADDRESS2
00000000
Note 46. The COMMAND determines the length of the data. If the written data exceeds the allotted
amount, the excess data is ignored.
3. Offset REG (OFREG) Write Preparation (during RUN)
Preparation
Write data
(1) COMMAND Code 0x90~0x9F (one data at 0x90, sixteen data at 0x9F)
(2) ADDRESS1
00000000
(3) ADDRESS2
0 0 0 A4 A3 A2 A1 A0
(4) DATA1
00000000
(5) DATA2
0 0 0 D12 D11 D10 D9 D8
(6) DATA3
D7~D0
4. Offset REG (OFREG) Write Operation (during RUN)
Execute
Write data
(1) COMMAND Code 0xA2
(2) ADDRESS1
00000000
(3) ADDRESS2
00000000
Note 47. The COMMAND determines the length of the data. If the written data exceeds the allotted
amount, the excess data is ignored.
6-4. Read Operation during System Reset
1. Program RAM (PRAM) Read (during system reset)
Field
Write data
Readout data
(1) COMMAND Code 0x38
(2) ADDRESS1
00000000
(3) ADDRESS2
00000000
(4) DATA1
0 0 0 0 D35 D34 D33 D32
(5) DATA2
D31~D24
(6) DATA3
D23~D16
(7) DATA4
D15~D8
(8) DATA5
D7~D0
Five bytes of data may be written continuously for each address.
2. Coefficient RAM (CRAM) Read (during system reset)
Field
Write data
Readout data
(1) COMMAND Code 0x34
(2) ADDRESS1
0 0 0 0 0 A10 A9 A8
(3) ADDRESS2
A7 ~ A0
(4) DATA1
D23~D16
(5) DATA2
D15~D8
(6) DATA3
D7~D0
Three bytes of data may be written continuously for each address.
014006643-E-00
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2014/10