SSD1901 View Datasheet(PDF) - Solomon Systech

Part Name

Description

Manufacturer

SSD1901

TFT Graphics Controller

Solomon Systech  

5 FUNCTIONAL BLOCK DESCRIPTION

5.1 Host Interface

The Host Interface provides the means for the CPU to communicate with the display memory and internal registers.

5.2

Memory Control

The Memory Control arbitrates between CPU accesses and display refresh accesses. It also generates the necessary

signals to control the SRAM display memory.

5.3

Display Control

The Display Control manages data flow from the Memory Control through the Look-Up Table and to the LCD Interface.

It also generates memory addresses for display refresh accesses.

Display memory represents one pixel on the display. Figure 5-1 "Display Data Memory Organization" shows the display

data formats

Byte 0

Byte 1

Byte 2

Host Address

M0

M1

M2

Display Memory

LUT

P0P1P2P3P4P5P6P7P8P9

Pn : RGB value from LUT index Mn

Panel Display

Figure 5-1 Display Data Memory Organization

5.4

Look - Up Table

The Look-Up Table contains three 256 entries, 4 bit wide Look-Up Tables or palettes, one for each pri mary color (red,

green and blue).

The following figures are intended to show the display data output path only.

Note

When Software Color Invert is enabled, the display data inverts after the Look-Up Table.

SOLOMON

REV 1.1

07/2001

SSD1901

5

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