DaKandEKid
New Member
I bought some Alphanumeric LED displays which only have 7 data lines and 4 mux. They have less i/o lines then typical alphanumeric led displays.
https://www.electro-tech-online.com/custompdfs/2004/10/MDA6141C6341C6441C6941C.pdf
If you look at page 3 on the datasheet above it shows you the schematic for the display. Now say for example you wanted to display a 3 on digit 1 of the display.
You would have to set the following segments high: A1 B2, C2, A2, D2
The cathodes are bused so if i set the Cathode 1 low it would turn on all segments which have the Anode set high. So, the problem is since i need to turn on A1. It forces me to have to turn on B1, C1, and D1 as well since the B, C, and D segments are set.
Therefore, I guess the only way to make most characters is to do them in two passes. One where all the digit one segments are set and then another where just the digit two segments are set.
I was unable to find any information about this type of LED display and was wondering if anyone could confirm that this is what you're supposed to do or if i was just missing something obvious and it's not that complicated.
https://www.electro-tech-online.com/custompdfs/2004/10/MDA6141C6341C6441C6941C.pdf
If you look at page 3 on the datasheet above it shows you the schematic for the display. Now say for example you wanted to display a 3 on digit 1 of the display.
You would have to set the following segments high: A1 B2, C2, A2, D2
The cathodes are bused so if i set the Cathode 1 low it would turn on all segments which have the Anode set high. So, the problem is since i need to turn on A1. It forces me to have to turn on B1, C1, and D1 as well since the B, C, and D segments are set.
Therefore, I guess the only way to make most characters is to do them in two passes. One where all the digit one segments are set and then another where just the digit two segments are set.
I was unable to find any information about this type of LED display and was wondering if anyone could confirm that this is what you're supposed to do or if i was just missing something obvious and it's not that complicated.