HT1621B
- Built-in 256kHz RC oscillator
- External 32.768kHz crystal or 256kHz frequency source input
- Selection of 1/2 or 1/3 bias, and selection of 1/2 or 1/3 or 1/4 duty LCD applications
- Internal time base frequency sources
- Two selectable buzzer frequencies (2kHz/4kHz)
- Power down command reduces power consumption
- Built-in time base generator and WDT
- Time base or WDT overflow output
- 8 kinds of time base/WDT clock sources
- 32x4 LCD driver
- Built-in 32x4 bit display RAM
- 3-wire serial interface
- Internal LCD driving frequency source
- Software configuration feature
- Data mode and command mode instructions
- R/W address auto increment
- Three data accessing modes
- VLCD pin for adjusting LCD operating voltage
- HT1621B: 48-pin SSOP package
HT1621B-Data.pdf HT1621B-App.pdf 
