AK7750 Datasheet, PDF (58/77 Pages) Asahi Kasei Microsystems – Audio DSP with Built-in Hands-Free Phone Features

[ASAHI KASEI]
[AK7750]
c) Coefficient RAM Read (during reset)
Coefficient RAM reads require inputting a command code and address to be accessed and setting SCLK to
fall after setting SI to “H”. Data is output synchronized with the falling edge of SCLK. When the requested
read addresses are in consecutive locations, repeat the above procedure again by setting SI to “H”.
Data transfer procedure
c Command code A1h
d Address upper
e Address lower
(1 0 1 0 0 0 0 1 )
(0 0 0 0 0 0 A9 A8)
(A7 . . . . . . A0)
S_RESET
RQ
SCLK
SI
SO
RDY
10100001 000000 A9A8 A7yyyyA1 A0
D15yyyyD0 D15yyyyD0
CRAM data read
[MS0296-E-00]
58
2005/03