HT16512 Holtek Semiconductor Inc, HT16512 Datasheet - Page 7

• Manufacturer Part Number: HT16512
• Description: 1/4 to 1/11 Duty VFD Controller
• Manufacturer: Holtek Semiconductor Inc

SW data
HT16512 provides an extra 4-bit general input port. The SW data is provided with available binary
code. The SW data is read with the read command, starting from the least significant bit. Bits 5
through 8 of the SW data are 0.
Commands
Commands set the display mode and status of the VFD driver.
The first 1 byte input to the HT16512 through the DI pin after the CS pin has fallen, is regarded as a
command. If CS is set high while commands/data are transmitted, serial communication is initial-
ized, and the commands/data being transmitted are not valid (however, the commands/data previ-
ously transmitted remains valid).
·
Display mode setting commands
These commands initialize the HT16512 and select the number of segments and the number of
grids (1/4~1/11 duty, 11 segments to 16 segments).
When these commands are executed, the display is forcibly turned off, and key scanning is also
stopped. To resume display, the display command ²ON² must be executed. If the same mode is se-
lected, nothing happens.
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December 24, 1999
HT16512