LA9220M 查看數據表（PDF） - SANYO -> Panasonic

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LA9220M

Analog Signal Processor Circuit (ASP) for CD Players

SANYO -> Panasonic 

LA9220M

Notes Concerning Microprocessor Program Creation (Supplementary)

1. Commands.

After sending the FOCUS START command and the E/F BALANCE START command, send 11111110 (FEH) in

order to clear the internal registers of the IC.

MSB LSB

Reason : Although the above commands are executed at point ¡ in the timing chart below, the same commands will

be executed again at point ™ if there is subsequent input to CE as shown below.

Timing chart

2. When sending the TRACK-OFFSET ADJUST START command or the FOCUS-OFFSET ADJUST START

command after either the VCC ON (POWER ON RESET), RESET command or a corresponding OFFSET ADJUST

OFF command, waiting time is necessary as listed below, (Only when a 4.2MHz clock is input.)

TRACK-OFFSET ADJUST START : 4ms or more

FOCUS-OFFSET ADJUST START : 30ms or more

3. E/F balance adjustment

E/F balance adjustments should be made in a bit region of the disc , not a mirrored region.

(This is because the E/F balance adjustment entails about 100 to 200 track kicks.)

Pattern Design Notes

To prevent signal jump-in from CV+ (pin 40) to RFSM (pin 41), a shielding line is necessary in between.

No.5188–11/20

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