RAM Mapping 32x4 LCD Controller for I/O MCU

The HT1620 is a 128 pattern (32x4), 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 current owing to adopting capacitor type bias charge pump. The HT162X series have many kinds of products that match various applications.

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

Specification:

• VDD: 2.4V~3.3V
• segment & common: 32×2, 32×3, 32×4
• LCD voltage: 3/2×VDD
• bias: 1/2, 1/3
• external crystal
• interface: 3-wire
• case: 64LQFP