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LC78620E Datasheet(PDF) 15 Page - Sanyo Semicon Device |
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LC78620E Datasheet(HTML) 15 Page - Sanyo Semicon Device |
15 / 34 page Note: 1. If focus is lost during the execution of an internal brake command, the pickup must first be refocussed and then the internal brake command must be reissued. 2. Since incorrect deceleration state determination is possible depending on the EFM signal playback state (e.g., disk defects, access in progress), we recommend using these functions in combination with a microprocessor. 8. Track Jump Circuit; Pin 19: HFL, pin 20: TES, pin 23: TOFF, pin 24: TGL, pin 25: THLD, pin 28: JP+, pin 29: JP– • The LC78620E supports the two track count modes listed below. The earlier track count function uses the TES signal directly as the internal track counter clock. To reduce counting errors resulting from noise on the rising and falling edges of the TES signal, the new track count function prevents noise induced errors by using the combination of the TES and HFL signals, and implements a more reliable track count function. However, dirt and scratches on the disk can result in HFL signal dropouts that may result in missing track count pulses. Thus care is required when using this function. No. 5130-15/34 LC78620E MSB LSB Command RES = low 0 0 1 0 0 0 1 0 NEW TRACK COUNT (using the TES/HFL combination) q q 0 0 1 0 0 0 1 1 EARLIER TRACK COUNT (directly counts the TES signal) |
Similar Part No. - LC78620E |
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Similar Description - LC78620E |
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