上海辰祥电子科技有限公司 联系人 ：周平 13917885749 HT1620 -- RAM Mapping 32x4 LCD Controller for I/O MCU Features Logic operating voltage: 2.4V~3.3V LCD voltage: 3.6V~4.9V Low operating current 3uA at 3V External 32.768kHz crystal oscillator 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) Built-in capacitor type bias charge pump Time base or WDT overflow output 8 kinds of time base/WDT clock source 32x4 LCD driver Built-in 32x4-bit display RAM 3-wire serial interface Internal LCD driving frequency source Software configuration feature R/W address auto increment Data mode and command mode instructions Three data accessing modes 64-pin LQFP package