ADE3800XT datasheet(64/138 Pages) STMICROELECTRONICS

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ADE3800

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The borders override the graphic pattern. In addition, the left and right edges override the top and

bottom ones: for example, when both left and top side borders are enabled, the upper left corner

has the color of the left side border.

Example:

PGEN_ENAB = 01 enables PGEN

PGEN_X_TOT_L = 00, PGEN_X_TOT_H = 05 considering that the panel is 1280 pixels wide

PGEN_Y_TOT_L = 00, PGEN_Y_TOT_H = 04 considering that the panel is 1024 pixels high

PGEN_B_TOP_BOT = EE adds a yellow horizontal borderline to top and bottom of display area

PGEN_B_LFT_RHT = 9A adds a blue vertical borderline to the left and a green one to the right

4.11.5 TCON Window Control

Normally, the whole PGEN block is enabled if its global enable bit PGEN_ENAB[0] is set.

If it is not set but the bit PGEN_ENAB[1] is set instead, the programmed pattern will show only

inside a rectangular window defined by the associated TCON signal TCON_X_PGEN. Outside this

window, the input video stream will be displayed as generated by the scaler.

Note:

If the global enable bit PGEN_ENAB[0] is set, it has priority over PGEN_ENAB[1].

White

Table 25: Pattern Generator Registers (Sheet 1 of 3)

Addr

Mode

Bits

Rst

Description

PGEN_ENAB

0600

R/W

[1]

Window control via TCON signal

0*: disable, use global enable bit 0 below

1: enable PGEN by TCON_X_PGEN

R/W

[0]

Global PGEN enable bit

0*: disable

1: enable

(this bit overrides bit 1 above)

PGEN_X_TOT_L

PGEN_X_TOT_U

0601

0602

R/W

[7:0]

[3:0]

screen total horizontal size in pixels

Table 24: Borders Colors

Colour

Red

Green

Blue

Value

PGEN pattern

displayed here

TCON window

input

video

signal

displayed

everywhere

else

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