The STM86312 is a VFD (Vacuum Fluorescent Display) controller/driver that features various display modes, key scanning, dimming circuit, high-voltage output, LED ports, and general-purpose input ports.
The STM86312 is a Vacuum Fluorescent Display (VFD) controller/driver designed to operate with duty factors ranging from 1/4 to 1/11. It integrates 11-segment and 6-grid output lines, along with a display memory and control circuit, making it suitable as a peripheral for single-chip microcomputers. The device supports various display modes, including configurations for up to 16 segments and 4 digits, and features a key scanning circuit for a 6x4 matrix.
| Duty factor | 1/4 to 1/11 |
|---|---|
| Display modes | 11 segments & 11 digits to 16 segments & 4 digits |
| Key scanning matrix | 6 x 4 |
| Dimming steps | eight |
| Maximum Vpp | 35V |
| LED ports | 4 channels, 20mA max |
| Package | PQFP44 |
The maximum Vpp voltage is 35V.
No external resistor is necessary for the driver output.
It uses a three-line serial interface consisting of CLK, STB, and DIO.