AK7750 Datasheet, PDF (60/77 Pages) Asahi Kasei Microsystems – Audio DSP with Built-in Hands-Free Phone Features

[ASAHI KASEI]
[AK7750]
e) Hands-Free Parameter RAM Read ( during reset )
Hands-Free program RAM reads require inputting a command code and address to be accessed and
waiting for SCLK to fall after setting SI to “H”. The data is then 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”.
Read hands-free parameter RAM after writing “1” to HF_RST_N bit and HF bit in CONT5 register as shown
in the page 71
Data transfer procedure
c Command code
d Address
E1h ( 1 1 1 0 0 0 0 1 )
( 0 0 A5 . . . . A0)
S_RESET
RQ
SCLK
SI
SO
RDY
11100000 00A5 A1 A0
D15yyyyyD0 D15yyyyyD0 D15yyyyyD0
Hands-Free Parameter RAM Read
[MS0296-E-00]
60
2005/03