DESCRIPTION

The PT6321 is a dot matrix fluorescent display tube controller driver IC which displays characters,

numerics and symbols. Dot matrix fluorescent display tube drive signals are generated by serial data sent from a microcontroller. A display system is easily realized by internal ROM and RAM for character display.

FEATURES

• Logic power supply(VDD): 3.3V±10% / 5.0V±10%

• Fluorescent display tube drive power supply (VDISP): 20V~60V

• VFD driver output current(VFD driver output can directly be connected to the fluorescent display tube. No pull-down resistor is required.)

  - Segment driver (SEG1 to SEG35): -5.0mA (VDISP=60V)

  - Segment driver (AD1 to AD4): -10.0mA (VDISP=60V)

  - Grid driver (COM1 to COM24): -20.0mA (VDISP=60V)

• General output port output current

  - Output driver (P1-4): ±1.0mA (VDD=3.3V±10%) ±2.0mA (VDD=5.0V±10%)

• Content of display

  - CGROM: 5x7 dots, 240 types (character data)

  - CGRAM: 5x7 dots, 16 types (character data)

  - ADRAM: 24 (display digit) x 4 bits (symbol data)

  - DCRAM: 24 (display digit) x 8 bits (register for character data display)

  - General output port: 4 bits (static mode)

• Display control function

  - Display digit: 9 to 24 digits

  - Display duty (contrast adjustment): 8 stages

  - All lights ON/OFF

• 3 interfaces with microcontroller: DA, /CS, /CP(4 interfaces if /RESET is added)

• 1-byte instruction execution (excluding data write to RAM)

• Built-in oscillation circuit (external C and R) 80-pin plastic LQFP (LQFP80-P-1414-0.65-K)