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I'm currently trying to use 74HC163 in a project, and it appears I have it wired up correctly, but it counts in a very strange sequence. I wrote down the sequence as follows:

1 10 11 101 110 111 1001 1010 1011 1101 1110 1111

Translated into decimal:

1 2 3 5 6 7 9 10 11 13 14 15

As you can see, it skips several numbers including 0. Why is this?

I have it wired as follows:

NOT CLR = 1
CLK = 10HZ clock from square wave generator
A = 0, B = 0, C = 0, D = 0
ENP = 1
GND = 0
VCC = 1
RCO = no connection
QA = LED, QB = LED, QC = LED, QD = LED
ENT = 1
NOT LOAD = 1

0 indicating unpowered, 1 indicating powered

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It was a defective wire, it had nothing to do with the chip.

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