Commands

STM86312

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8

Commands

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

regarded as a 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).

8.1

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.

Figure 6.

Display mode settings

MSB

LSB

00

-

-

-

b2

b1

b0

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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