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Urgent! Urgent! Urgent! Special digital display on the MAX7219 chip applications, in particular the connection

Answers:1   |   LastAnswerAt:2011.06  

Question
visitor
mary ford 
Asked at 2011.06.09 23:58:59
I 89C51 of the P2.0, P2.1, P2.2 port and MAX7219CNG of DIN, LOAD, CLK pin is directly connected. But as soon as a plug in the 7219 chip (DIP Type), 89C51 do not know why the film to heat. I suspect the problem may be the current matching, do not know how to solve. Please experts help me as soon as possible, thank you! ! ! ! ! Special emergency! Information on the MAX7219CNG www.maxim-ic.com.
answer Tommy Fan  Answered at 2011.06.09 23:58:59
As long as power is not reversed, then the wrong line of chips will not result in heat 51. So appearance is a plug 89C51 chip to heat the film, the real your welding and the line has a short circuit. Open when not inserted, opinions on a short-circuit the plug.
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