PS081 datasheet(69/155 Pages) AMSCO

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4-12

PSØ81

for segment

lcd_pos[]=

4.2.6

Setting the Segment Position

Each segment of the configuration bits lcd_segment can be linked to an arbitrary crossing of the line

and common drivers. This offers a high flexibility and allows to connect existing LCD’s.

Limitations:

The segment lines and eventually common lines 3,4 have to be connected to the right digit of the

display. The order within one digit is free. Otherwise the command no2lcd will mix up the digits.

In register lcd_segment the program sets the segments to be displayed. lcd_pos defines which bit in

lcd_segment refers to the one out of the 8 target segments.

Example: 4xMux Display

Defaut Wiring for the PSØ81:

Last digit to the

left

Last digit to the

right

Seg

...

Seg

...

Com1

lcd_pos

[14...12]

lcd_pos

[2...0]

lcd_pos

[14...12]

lcd_pos

[2...0]

...

lcd_pos

[14...12]

lcd_pos

[2...0]

Com2

lcd_pos

[17...15]

lcd_pos

[5...3]

lcd_pos

[17...15]

lcd_pos

[5...3]

...

lcd_pos

[17...15]

lcd_pos

[5...3]

Com3

lcd_pos

[20...18]

lcd_pos

[8...6]

lcd_pos

[20...18]

lcd_pos

[8...6]

...

lcd_pos

[20...18]

lcd_pos

[8...6]

Com4

lcd_pos

[23...21]

lcd_pos

[11...9]

lcd_pos

[23...21]

lcd_pos

[11...9]

...

lcd_pos

[23...21]

lcd_pos

[11...9]

Figure 4.9 4mux-digit.gif

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