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请问原理图转pcb时(EC0)出现这个错误是什么原因
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8 t% u& ]: B& ~Line 195 , Section *NET*+ o- a: w& h* Z) @3 b
R8.1 U1.26
0 Z1 w, h+ r9 y8 K! e; @. I* Pin number 26 is out of range for part U1 STC89C51
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Line 197 , Section *NET*
: U7 C: d M8 ]5 W* k4 U& G: K! v( BR12.1 U1.27
) d: G5 q1 V6 _ N* Pin number 27 is out of range for part U1 STC89C51+ W4 [( Q7 x7 h# W
4 d+ b$ X" }( X( G! b' ZLine 199 , Section *NET*
/ B: [! z1 i* t) y* yR16.1 U1.28
: J8 [, t7 ?' Q9 Z8 V! M) v* Pin number 28 is out of range for part U1 STC89C51, ?8 z4 h6 T6 X9 ?! I1 h& B0 }3 w
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Line 201 , Section *NET*2 A$ |! \2 w5 P: ?3 I
R9.1 U1.376 n/ |# E8 v5 t- L6 J; |! a
* Pin number 37 is out of range for part U1 STC89C51 |
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