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HD66520T - 160-Channel 4-Level Grayscale Display Column Driver

Description

The HD66520 is a column driver for liquid crystal dot-matrix graphic display systems.

This LSI incorporates 160 liquid crystal drive circuits and a 160 × 240 × 2-bit bit-map RAM, which is suitable for LCDs in portable information devices.

Features

  • Duty cycle: 1/64 to 1/240.
  • Liquid crystal drive circuits: 160.
  • Low-voltage logic circuit: 3.

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Full PDF Text Transcription

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HD66520T (160-Channel 4-Level Grayscale Display Column Driver with Internal Bit-Map RAM) Preliminary Description The HD66520 is a column driver for liquid crystal dot-matrix graphic display systems. This LSI incorporates 160 liquid crystal drive circuits and a 160 × 240 × 2-bit bit-map RAM, which is suitable for LCDs in portable information devices. It also includes a general-purpose SRAM interface so that draw access can be easily implemented from a general-purpose CPU. The HD66520 also has a new arbitration method which prevents flicker when the CPU performs draw access asynchronously. The on-chip display RAM greatly decreases power consumption compared to previous liquid crystal display systems because there is no need for high-speed data transfer.
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