HT1621BAM/TR

The HT1621BA is a peripheral device for expanding microcontroller I/O ports. Its display matrix is 32×4, forming a 128-dot memory-mapped multi-function LCD driver circuit. The software features of this device make it well-suited for LCD display applications, including LCD modules and display subsystems. The interface between the host controller and the HT1621BA requires only 3 or 4 ports. A power-down command is available to reduce power consumption.

Applications

• Two-wheel electric bicycles
• Central air conditioning control panels
• Instrumentation
• Health measurement products
• Home appliances

Key features

• Operating voltage: 2.4V～5.0V
• Built-in 256kHz RC oscillator
• Supports external 32.768kHz crystal or 256kHz clock input
• Supports 1/2 or 1/3 bias, 1/2, 1/3, or 1/4 duty cycle
• Built-in time base frequency source
• Two buzzer frequency options (2kHz/4kHz)
• Power-down command for reduced power consumption
• Built-in time base and watchdog timer circuit
• Time base/watchdog timer overflow output
• 8 time base/watchdog timer clock sources
• 32×4 LCD driving capability
• 32×4-bit display RAM
• 3-wire serial interface
• Built-in LCD drive frequency
• Software configurable
• Data mode and command mode instructions
• Auto-increment read/write address
• Three data access modes
• LCD voltage adjustable via VLCD pin; VLCD voltage must be less than or equal to VDD voltage