STM86312

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SW DATA

The SW data are read by the appropriate read command, starting from the least significant bit. Bits 5

through 8 of the SW data are 0.

COMMANDS

A command sets the display mode and status of the VFD driver.

command. If STB is set high while commands/data are transmitted, serial communication is initialized,

and the commands/data being transmitted are invalid (however, the commands/data already transmitted

remain valid).

(1) DISPLAY MODE SETTING COMMAND

This command initializes the STM86312 and selects the number of segments and number of grids (1/4 to

1/11 duty, 11 segments to 16 segments).

When this command is executed, display is forcibly turned off, and key scanning is also stopped. To

resume display, the display ON command must be executed. If the same mode is selected, however,

nothing is performed.

On power application, the 11-digit 11-segment mode is selected.

MSB

LSB

0

0

0

0

b3

b2b1b0

SW1

SW2

SW3

SW4

MSB

LSB

0

0

-

-

-

b2b1b0

DISPLAY MODE SETTING

000 : 4 digits, 16 segments

001 : 5 digits, 16 segments

010 : 6 digits, 16 segments

011 : 7 digits, 15 segments

100 : 8 digits, 14 segments

101 : 9 digits, 13 segments

110 : 10 digits, 12 segments

111 : 11 digits, 11 segments

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