LV1605M Datasheet, PDF (13/24 Pages) Sanyo Semicon Device – Monolithic Linear IC Analog Signal Processor for CD Players

LV1605M
Notes on Microcontroller Software Implementation
• Command relationships
Since the IC internal registers are cleared after either a FOCUS START or an E/F BALANCE START command is
issued, applications must issue a 11111110 (= FEh (hexadecimal)) command after either of those commands.
Reason: Those two commands are executed at point (1) in the timing chart below. However, after that, if a CE signal
such as that shown below is input, the data will be executed again as the same command at point (2) in the timing
chart.
At least 2µs
1
2
At least 2µs
At least 10µs
CE
At least 1µs
CL
DAT
At least 1µs
LSB
MSB
0 0 0 1 0 0 0 0 : FOCUS START command
0 0 1 1 1 0 0 1 : E/F BALANCE START command
A13939
When either a TRACK-OFFSET ADJUST START or a FOCUS-OFFSET ADJUST START command is issued after
either a VCC ON (POWER ON RESET), RESET, or a corresponding OFFSET ADJUST OFF command, the wait
time shown below is required. (Note that this applies in the state where the 130kHz clock is input.)
TRACK-OFFSET ADJUST START: At least 4ms
FOCUS-OFFSET ADJUST START: At least 4ms
• Notes on E/F balance adjustment
The E/F balance adjustment must be performed not on a disc mirror area, but on a disc pit area.
Also, since track kick operations are not performed during the EF balance adjustment, care must be taken that a stable
TE signal is acquired. (For example, by performing sled advance operations from the microcontroller.)
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