LAPIS Semiconductor

FEDL9212-01

Issue Date: Nov., 26, 2002

ML9212

32-Bit Duplex/Triplex (1/2 duty / 1/3 duty) VF Controller/Driver with Digital Dimming

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GENERAL DESCRIPTION

The ML9212 is a full CMOS controller/driver for Duplex or Triplex (1/2 duty or 1/3 duty) vacuum fluorescent

display tube. It consists of a 32-segment driver multiplexed to drive up to 96 segments, and 10-bit digital dimming

circuit.

ML9212 features a selection of a master mode and a slave mode, and therefore it can be used to expand segments

for the VFD driver with keyscan and A/D converter function.

ML9212 provides an interface with a microcontroller only by three signal lines: DATA IN, CLOCK and CS.

FEATURES

 Logic supply voltage (V

: 4.5 to 5.5 V

 Driver supply voltage (V

: 8 to 18 V

 Duplex/Triplex (1/2 duty / 1/3 duty) selectable

DUP/

TRI = 1/2 duty selectable at “H” level

DUP/

TRI = 1/3 duty selectable at “L” level

 Number of display segments

Max. 64-segment display (during 1/2 duty mode)

Max. 96-segment display (during 1/3 duty mode)

 Master/Slave selectable

M/

S = Master mode selectable at “H” level

M/

S = Slave mode selectable at “L” level

 Interface with a microcontroller

Three lines: CS, CLOCK, and DATA IN

 32-segment driver outputs

and require no external resisters)

 3-grid pre-driver outputs

(require external drivers)

 Logic outputs

 Built-in digital dimming circuit (10-bit resolution)

 Built-in oscillation circuit (external R and C)

 Built-in Power-On-Reset circuit

 Package options:

56-pin plastic QFP (QFP56-P-910-0.65-2K)(ML9212GA)