ST6391 datasheet(49/68 Pages) STMICROELECTRONICS

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WE. Word Enable. The word enable bit defines

whether or not the following word is displayed.

“0” -The word is not displayed.

“1” -If the global enable bit is one, then the word is

displayed.

HSE. Horizontal Space Enable. The horizontal

space enable bit determines the spacing between

words. The space between characters is always 0.

The alphanumeric character set is implemented in

a 5 x 7 format with one empty column to the right

and one empty row above and below so that the

space between alphanumeric characters will be

one dot.

“0” -The space between words is equal to the width

of the space character, which is 6 dots.

“1” -The space between words is defined by the

value in the horizontal space register plus the

width of the space character.

D7. This bit is not used

S. Character Size. The character size bit, along

with the global size bits (GS2 and GS1) located in

the horizontal space register, specify the character

size for each line as defined in Table 11.

R, G, B. Colour. The 3 colour control bits define the

colour of the following word as shown in Table 10.

BGS. Background Select. The background select

bit selects the desired background for thefollowing

word. There are two possible backgrounds defined

by the bits in the Background Control Register.

“0”- The background on the following word is en-

abled by BG0 and the colour is set by R0, G0,

and B0.

“1” -The background on the following word is en-

abled by BG1 and the colour is set by R1, G1,

and B1.

WE. Word Enable. The word enable bit defines

whether or not the following word is displayed.

“0” -The word is not displayed.

“1” -If the global enable bit is one, then the word is

displayed.

VSE. Vertical Space Enable. The vertical space

enable bit determines the spacing between lines.

“0” -The space between lines is equal to 0H. The

alphanumeric character set is implemented in

a 5 x 7 format with one empty column to the

right and one empty row above and onebelow

and stored in a 6 x 9 format.

“1” -The space between lines is defined by the

value in the vertical space register.

Table 10. Format Character Register Colour

Setting.

Colour

Black

Blue

Green

Cyan

100

Red

Magenta

Yellow

White

Table 11. Format Character Register Size

Setting

GS2 GS1

Vertical Height

Horizontal length

18H

6 TDOT

36H

12 TDOT

18H

6 TDOT

54H

18 TDOT

36H

12 TDOT

54H

18 TDOT

36H

12 TDOT

72H

24 TDOT

TDOT= 2/fosc

D7. This bit is not used.

ON-SCREEN DISPLAY (Continued)

Format Character

See Data RAM Table Description

for Specific Address

( Write Only)

D7 D6 D5 D4 D3 D2 D1 D0

VSE = Vertical Space Enable

WE = Word Enable Bit

BGS = Backround Select

B = B Colour Bit

G = G Colour Bit

R = R Colour Bit

S = Character Size Control Bit

Unused

Figure 57. Format Character Register

Explanation

ST6391,92,93,95,97,99

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