HT16511 -- 1/8 to 1/16 Duty VFD Controller

　　General Description

　　HT16511 is a VFD (Vacuum Fluorescent Display) controller/driver that is driven on a 1/8 to 1/16 duty factor. It consists of 12 segment output lines, 8 grid output lines, 8 segment/grid output drive lines, 5 LED output ports, a control circuit, a display memory, and a key scan circuit.

　　Serial data inputs to the HT16511 through a three-line serial interface. This VFD controller/driver is ideal as a peripheral device for an MCU. Features

　　Logic voltage: 5V

　　High-voltage output: VDD-35V max.

　　Multiple display (12-segment & 16-digit to 20-segment & 8-digit)

　　12x4 matrix key scanning

　　8 steps dimmer circuit

　　5 LED output ports (20mA max.)

　　4-bit general purpose input port

　　No external resistors necessary for driver output (provides PMOS open-drain and

　　pull-low resistor output)

　　Serial interface with MCU (CLK, CSB, DI, DO)

　　52-pin QFP package