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.