AN8725FH Datasheet, PDF (33/36 Pages) Panasonic Semiconductor – Semiconductor laser power control IC

ICs for Optical Disk Drive
s Application Notes (continued)
5. Register circuit configuration (continued)
3) DAC56R, DAC56W
DT0
to DT7
8-bit
White data (0 to 7)
D-FF
D
Q
8-bit
Data (0 to 7)
Selector
A
AN8725FH
WR5
8-bit
Read data (0 to 7)
RD5
CK
3-state
driver
Data (0 to 3)
Insufficiently
emitted light
DAC5
4-bit
8-bit
Data (0 to 7)
RPHOLD = low
output A
RPHOLD = high
output B
Data (4 to 7)
Excessively
emitted light
DAC6
4-bit
8-bit
White data (0 to 7)
D-FF
8-bit
D
Q Data (0 to 7) B
WR6
CK
8-bit
Read data (0 to 7)
3-state
driver
8-bit
Data (0 to 7)
RD6
RPHOLD
33