HT1620 - Holtek Semiconductor Inc

HT1620 RAM Mapping 32 x 4 LCD Controller

The HT1620 is a 128 pattern (32´4), memory mapping, and multi-function LCD driver. The S/W configuration feature of the HT1620 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 HT1620. The HT1620 consumes low operating curre.

Features

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· Logic operating voltage: 2.4V~3.3V LCD voltage: 3.6V~4.9V Low operating current <3mA 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
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· 8 kinds of time base/WDT clock source 32´4 LCD driver Built-in 32´4-bit display RAM 3-wire serial interface Internal LCD driving frequency source Software configuration feature R/W address.