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ML9261A Datasheet(PDF) 11 Page - OKI electronic componets

Part No. ML9261A
Description  60-Bit Vacuum Fluorescent Display Tube Grid/Anode Driver
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Maker  OKI [OKI electronic componets]
Homepage  http://www.oki.com

ML9261A Datasheet(HTML) 11 Page - OKI electronic componets

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OKI Semiconductor
Display Data Reset
When the power is turned on, the shift register outputs (PO1 to PO60) and register outputs (O1 to O60) are
indeterminate. Consequently the display of a VFD tube may flicker because unnecessary driver outputs go high.
To prevent such flicker, it is required to perform the following operations.
1. Turn on the logic power supply while the
CL input is kept low.
2. Set the LS input high.
3. Switch the CLK input from a low level to a high level at least once.
By performing the above operations, all of the shift register outputs (PO1 to PO60) and register outputs (O1 to
O60) are set low.
4. Enter display data.
5. Set the
CL input high.
Data Transfer
Write display data by using a serial transfer.
Serial data is input in the shift register at the rising edge of a CLK input pulse.
When the LS input rises, display data is written in the latch.
Driver Output Control
1. To turn on or off driver outputs by using display data transferred into the shift register, set the
CL input high
and set the CHG input low.
2. To set all the driver outputs low, set the
CL input low.
3. To set all the driver outputs high, set the
CL input and CHG input high at a time.

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