[ASAHI KASEI]
[AK7740ET]
7-2-b) Program RAM read (during reset phase)
To read data written into PRAM, input the command code and the address to be read out. After that, set SI to "H" and
SCLK to "L". The data is clocked out from SO synchronized with the falling edge of SCLK (ignore the RDY
operation that will occur in this case). If there are continuous addresses to be read, repeat the above procedure starting
from the step where SI is set to "H".
Data transfer procedure
cCommand code input C1h ( 1 1 0 0 0 0 0 1 )
dRead address input MSB ( 0 0 0 0 0 0 0 A8)
eRead address input LSB
(A7 .
.
.
.
A0)
S_RESET
RQ
SCLK
SI
11000001 0000000 A8 A7 **** A1 A0
SO
RDY
D31 **** D0 D31 **** D0
Reading of PRAM data
<Pre-E-01>
- 36 -
2006/10
AKM [ ASAHI KASEI MICROSYSTEMS ]
