Nxp Semiconductors UM10237 User Manual

UM10237_2

© NXP B.V. 2008. All rights reserved.

For monochrome STN mode, only the red palette field bits [4:1] are used. However, in 
STN color mode the green and blue [4:1] are also used. Only 4 bits per color are used, 
because the gray scaler only supports 16 different shades per color.

 shows the bit representation of the palette data for the STN monochrome 

mode.

 

The hardware cursor is an integral part of the LCD controller. It uses the LCD timing 
module to provide an indication of the current scan position coordinate, and intercepts the 
pixel stream between the palette logic and the gray scale/output multiplexer.

All cursor programming registers are accessed through the LCD slave interface. This also 
provides a read/write port to the cursor image RAM.

The hardware cursor is contained in a dual port RAM. It is programmed by software 
through the AHB slave interface. The AHB slave interface also provides access to the 
hardware cursor control registers. These registers enable you to modify the cursor 
position and perform various other functions.

When enabled, the hardware cursor uses the horizontal and vertical synchronization 
signals, along with a pixel clock enable and various display parameters to calculate the 
current scan coordinate.

5

G[0]

Unused

G[0]

Unused

4:1

R[4:1]

Red palette data

B[4:1]

Blue palette data

0

R[0]

Unused

B[0]

Unused

31

-

Unused

30:27

-

Unused

26

-

Unused

25:22

-

Unused

21

-

Unused

20:17

Y[3:0]

Intensity data

16

-

Unused

15

-

Unused

14:11

-

Unused

10

-

Unused

9:6

-

Unused

5

-

Unused

4:1

Y[3:0]

Intensity data

0

-

Unused