Quote:
Originally Posted by mora
I remember checking it was pin compatible. I might have failed though. Datasheet tells that backlight should draw 20mA. Hmm.
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Sorry to say the pinout is different. While the pin assignments are the same, the physical location of those pins on the board are in a different order.
(see attached)
The eio display goes pin 14 down to 1, then 15, 16. Yours is 1 straight through 16. Basically 1 thru 14 swapped. 15&16 same so LED works.
Backlight looks like a single white LED to only draw 20mA. Assuming there no on board series limiting resistor, the 15 ohm would cause it to draw a lot of current, but not 700mA! If white LED dropped 3.5V then 15ohm would limit to 100mA. Swapping among the other lines must be the culprit.
I'd be prepared to have a backup PIC just in case
