GENERAL DESCRIPTION

The MSC7128-xx is a general purpose display controller for vacuum fluorescent display tube.

The MSC7128-xx drives displays with up to 35 anodes (dots) and up to 16 grids (characters) plus a cursor.

The controller accepts command and display data input words on a clocked serial input line.

Commands control the on/off duty cycle, starting character position, number of characters to display and display modes (PLA mode and Lamp Test mode). An internal PLA-type character generator provides character decoding and dot pattern generation for the full 128 characters. A 35 · 128-bit PLA (ROM) code is programmable.

FEATURES

• Logic supply voltage (VDD) :+5V

• VF driver supply voltage (VEE) :–55V

• Driver output current

– VF grid driver :–30mA

– VF anode driver :–2mA

– VF cursor driver :–10mA

• Direct drive capability for vacuum fluorescent display (no pull-down resistor is required)

• Built-in oscillation circuit

• Built-in power-on-reset circuit with external C

• Serial host interface (data in, clock, chip select)

• Serial data input for 8-bit control and display data words

• Command functions

– On/off duty cycle : 0/16 to 15/16

– Character display position : 0 to 15

– Number of display digits :1 to 16

– Display modes : PLA mode, and Lamp Test mode

• Built-in 35 x 128-bit PLA-type character generator

– Character font :5 x 7

– Number of characters :128

– Programmable PLA code

• Package options:

64-pin plastic SDIP (SDIP64-P-750-1.78) (Product name : MSM7128-xxSS)

64-pin plastic QFP (QFP64-P-1420-1.00-BK) (Product name : MSM7128-xxGS-BK) xx indicates the code number.