HT1621 HT1621 RAM Mapping 32x4 LCD Controller for I/O MCU Features Operating voltage: 2.
4V ~ 5.
2V Built-in 256kHz RC oscillator External 32.
768kHz crystal or 256 kHz 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 a 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...

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