HG1621BM/TR

HG1621B is a peripheral device for expanding MCU I/O ports. With a display matrix of 32×4, it is a 128-dot matrix memory-mapped multi-function LCD driver circuit. The software features of HG1621B make it well-suited for LCD display applications, including LCD modules and display subsystems. The interface between the host controller and HG1621B requires only 3 or 4 ports. The Power Down command reduces power consumption.

Key features

• Operating voltage: 2.4V~5.2V
• Built-in 256kHz RC oscillator
• External 32.768kHz crystal or 256kHz clock input
• 1/2 or 1/3 bias, 1/2, 1/3, or 1/4 duty cycle
• Internal Time base frequency source
• Two buzzer frequencies selectable (2kHz/4kHz)
• Power down command for reduced power consumption
• Internal Time base and WDT watchdog circuit
• Time base/WDT overflow output
• 8 Time base/WDT clock sources
• 32×4 LCD driver
• 32×4-bit display RAM
• 3-wire serial interface
• Internal LCD drive frequency
• Software configurable
• Data mode and command mode instructions
• R/W address auto-increment
• Three data access modes
• VLCD pin for LCD voltage adjustment; VLCD voltage must be less than or equal to VDD voltage