LC75725E Просмотр технического описания (PDF) - SANYO -> Panasonic

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LC75725E

1/4 to 1/11 Duty Dynamic Drive VFD Driver

SANYO -> Panasonic 

LC75725E

BLK and the Display Control

Since the LSI internal data (D1 to D473 and the control data) is undefined when power is first applied, the display is off

(S1 to S43 and G1 to G11 pins = VFL level) by setting the BLK pin low at the same time as power is applied.

Then, meaningless display at power on can be prevented by transfering the necessary serial data from the controller while

the display is off and set the BLK pin high after the transfer completes. (See Figure 3.)

Power Supply Sequence

The following sequences must be observed when the power is turned on and off. (See Figure 3.)

• Power on : Logic block power supply (VDD) on → Driver block power supply (VFL) on

• Power off : Driver block power supply (VFL) off → Logic block power supply (VDD) off

Figure 3

No. 5606-12/13

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