HT1621为128（32×4）段LCD驱动器。它可设置为1/2或1/3偏置且通过S/W配置设置为2，3或4个共用的LCD驱动器。这使得HT1621适于多LCD应用。LCD驱动时钟从系统时钟内产生，一般为256KHZ。-HT1621 for 128 (32 × 4) above LCD drive. It can be set to 1/2 or 1/3 bias and through the S/W configuration settings for the 2,3 or 4 shared LCD drive. This makes HT1621 more suitable for LCD applications. LCD driver clock generated from the system clock, but generally they 256KHZ.