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DESCRIPTION

The SED1374 is a color/monochrome LCD graphics controller with an embedded 40K Byte SRAM display buffer. The high integration of the SED1374 provides a low cost, low power, single chip solution to meet the requirements of embedded markets such as Office Automation equipment, Mobile Communications devices, and Hand-Held PCs where board size and battery life are major concerns.

FEATURES

Memory Interface

? Embedded 40K byte SRAM display buffer.

CPU Interface

? Direct support of the following interfaces:

Hitachi SH-3.

Hitachi SH-4.

Motorola M68K.

MPU bus interface with programmable READY.

? Direct memory mapping of internal registers.

? CPU write buffer.

Display Support

? 4/8-bit monochrome LCD interface.

? 4/8-bit color LCD interface.

? 16-bit color LCD interface with minimal external curcuitry.

? Single-panel, single-drive passive displays.

? Dual-panel, dual-drive passive displays.

? Active Matrix TFT / TFD interface.

? Example resolutions:

640x480 at a color depth of 1 bpp

640x240 at a color depth of 2 bpp

320x240 at a color depth of 4 bpp

240x160 at a color depth of 8 bpp

Clock Source

? Single clock input for both pixel and memory clocks.

? The SED1374 clock source can be internally divided down for a higher frequency clock input.

? Dynamic switching of memory clocks in portrait mode.

Display Modes

? Hardware Portrait Mode: direct hardware rotation of display image for portrait mode display.

? 1/2/4 bit-per-pixel (bpp), 2/4/16-level grayscale display.

? 1/2/4/8 bit-per-pixel, 2/4/16/256-level color display.

? Up to 16 shades of gray by FRM on monochrome passive LCD panels.

? 256 simultaneous of 4096 colors on color passive and active matrix LCD panels.

? Split screen display for all panel modes allows two different images to be simultaneously displayed.

? Virtual display support (displays images larger than the panel size through the use of panning).

Power Down Modes

? Hardware and software Suspend modes.

? LCD power-down sequencing.

General Purpose IO Pins

? Five General Purpose Input / Output pins are available.

Operating Voltage

? 2.7 volts to 5.5 volts.

Package

? 80-pin QFP14 surface mount package.