Topic: DMD0026
SEG - Hex/BCD to 7 Segment Display
The Hex/BCD to 7 Segment Display (SEG) instruction is used to convert a single four digit HEX value to seven segment display format. Remaining digits will set to '3F' - the seven segment display for the value 0.
A seven segment display, as its name indicates, is
composed of seven individual elements (typically labeled A through G).
The On / OFF states of the individual elements can be combined to produce
simplified representations of numbers and letters.
The following chart that details which segments of the display are set ON to generate the ten decimal numerals (0 - 9) and six hexadecimal "letter digits" (A - F) of the hexadecimal number system.
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Segments |
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|
Input |
Input |
Output |
g |
f |
e |
d |
c |
b |
a |
Value on Display |
|
0 |
0x00 |
0x3F |
0 |
1 |
1 |
1 |
1 |
1 |
1 |
0 |
|
1 |
0x01 |
0x06 |
0 |
0 |
0 |
0 |
1 |
1 |
0 |
1 |
|
2 |
0x02 |
0x5B |
1 |
0 |
1 |
1 |
0 |
1 |
1 |
2 |
|
3 |
0x03 |
0x4F |
1 |
0 |
0 |
1 |
1 |
1 |
1 |
3 |
|
4 |
0x04 |
0x66 |
1 |
1 |
0 |
0 |
1 |
1 |
0 |
4 |
|
5 |
0x05 |
0x6D |
1 |
1 |
0 |
1 |
1 |
0 |
1 |
5 |
|
6 |
0x06 |
0x7D |
1 |
1 |
1 |
1 |
1 |
0 |
1 |
6 |
|
7 |
0x07 |
0x07 |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
7 |
|
8 |
0x08 |
0x7F |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
8 |
|
9 |
0x09 |
0x67 |
1 |
1 |
0 |
0 |
1 |
1 |
1 |
9 |
|
10 |
0x0A |
0x77 |
1 |
1 |
1 |
0 |
1 |
1 |
1 |
A |
|
11 |
0x0B |
0x7C |
1 |
1 |
1 |
1 |
1 |
0 |
0 |
b |
|
12 |
0x0C |
0x39 |
0 |
1 |
1 |
1 |
0 |
0 |
1 |
C |
|
13 |
0x0D |
0x5E |
1 |
0 |
1 |
1 |
1 |
1 |
0 |
d |
|
14 |
0x0E |
0x79 |
1 |
1 |
1 |
1 |
0 |
0 |
1 |
E |
|
15 |
0x0F |
0x71 |
1 |
1 |
1 |
0 |
0 |
0 |
1 |
F |
Parameters:
Note: Use the F9 key (Element Browser) or Down-Arrow key (Auto-Complete) at any time to see a complete list of the memory locations that are valid in the current field of the instruction.
4 Digit Hex/BCD Value - specifies the input value to convert This can be any constant value or any readable numeric location. Note: use cast operations to truncate the Output to the desired number of digits. For example, :UB0 (unsigned Byte) for one digit, :UW0 (unsigned word) for two digits.
4x8 Bit a-g Output - designates a location to store the converted value. This can be any writable numeric location.
See Also:
SEG - Hex/BCD to 7 Segment Display
Rung Example:
