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5.1.2 SYSTEM OPERATION FLOW
Power on
1. 186 CPU initializes SERVO, DSP &
RISC registers
2. Write RISC code to SDRAM
3. Reset RISC
Show LOGO
YES
Tray closed?
Tray close to closed position
SLED at inner side?
SLED moves to inner position
1. Judge whether have disc and disc type
2. Jump to related disc reading procedure
Recieve
OPEN/CLOSE key?
1. Execute pressed key & IR key
2. System operation routine loop
1. Stop playback & open tray
2. Display tray open message & LOGO
NO
Receive CLOSE key?
NO
YES
NO
YES
NO
YES
(No.YD119)1-15
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