工作电压：2.4—5.2V

内置256kHzRC振荡器

可外接32.768kHz晶体或256kHz外置时钟频率输入

可选择1/2或1/3偏置及1/2或1/3或1/4周期LCD应用方式

内置基本时钟频率源

2k和4k蜂鸣器频率

省电模式可降低功耗      内置时基发生器和WDT      时基发生器和WDT溢出输出      8种时基/WDT时钟源      32×4LCD驱动器      内置32×4显示存储器（RAM）      仅需3条通信线与控制器连接      内含LCD驱动信号源      软件配置方式      数据模式和命令模式指令      读写（R/W）地址自动增加      三数据访问模式      VLCD引脚可调整LCD工作电压

General Description

The HT1621 is a 128 pattern (32x4), memory mapping, and multi-function LCD driver. The S/W configuration feature of the HT1621 makes it suitable for multiple LCD applications including LCD modules and display subsystems. Only three or four lines are required for the interface between the host controller and the HT1621. The HT1621 contains a power down command to reduce power consumption.  Features

Operating voltage : 2.4V~5.2V
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
HT1621: 48-pin SSOP package
HT1621B: 48-pin DIP/SSOP/LQFP package
HT1621D: 28-pin SKDIP package
HT1621G: Gold bumped chip
 

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