FEDL9272-02

LAPIS Semiconductor

ML9272

12/15

NOTES ON USE

1.

Connect D-GND to L-GND externally to be an equal potential voltage.

2.

The contents of the shift register are undefined when the power is applied.

Therefore, unnecessary driver outputs may be driven high just after power-on, and the VFD tube may flicker.

To avoid this, follow the procedures:

1)

Apply the driver power supply after applying the logic power supply, with the CL pin remained low.

2)

Start displaying by setting the CL pin high after putting display data from the shift register through the

DIN pin.