ak7714 AKM Semiconductor, Inc., ak7714 Datasheet - Page 32

• Manufacturer Part Number: ak7714
• Description: 20-bit Audio Codec With Dsp And Delay Ram
• Manufacturer: AKM Semiconductor, Inc.

[ASAHI KASEI]
c) Coefficient RAM write (during reset phase)
Data comprising a set of 5 bytes (in case of 1-word CRAM writting ) is used to perform the coefficient RAM write
operation (during the reset phase). When all data has been transferred, the RDY terminal goes to "L". Upon completion
of writing into CRAM, it goes to "H" to allow the next data to be input. When data of continuous addresses is written,
input the data(
WRQ hold to “L”.) To write discontinuous data, shift the WRQ terminal from "H" to "L". Then input the command code,
address and data in that order.
(For RESET, operate both CODEC RESET and DSP RESET simultaneously.)
M0018-E-00
Data transfer procedure
1
2
3
4
5
4
Command code
Address upper
Address lower
Data
Data
to
5
) of after the next address as is. (No command code or address is required and RESET and
Input of discontinuous address data into CRAM
(10100000)
(0000000A8)
(A7......A0)
(D15 ..... D8)
(D7......D0)
Input of continuous address data into CRAM
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[AK7714]
‘98/07