Slap me silly and call me suzy, dang, I been looking at it all backwards. So it is a 1 to many, not many to 1. Pin 1 is input or output, now I got it, I think.
I must be going lulu...
Slap me silly and call me suzy, dang, I been looking at it all backwards. So it is a 1 to many, not many to 1. Pin 1 is input or output, now I got it, I think.
I must be going lulu...
I use an voltage source as a selected signal. Therefore when I change the input voltage, I hope to see the same change in the selected channel. The plus of the voltage source is connected to the Z pin, the minus is connected to the Ground of demux.
I use an voltage source as a selected signal. Therefore when I change the input voltage, I hope to see the same change in the selected channel. The plus of the voltage source is connected to the Z pin, the minus is connected to the Ground of demux.
At the beginning of the test, I gave a 0000 to the demux, therefore the 0 channel was chosen, and it worked totally fine, and now seems the signal has been locked in the 0 channel, It cannot switch to the other channels, no matter how I modify my code.
aha.. ESD protection I know, I ground myself with touching the ground of the wall plug. I thought u meant observing it by some way.
u know weird thing is if I damaged the chip, then a new chip should work properly, but after changing another same demux, the channel 0 was still locked.
aha.. ESD protection I know, I ground myself with touching the ground of the wall plug. I thought u meant observing it by some way.
u know weird thing is if I damaged the chip, then a new chip should work properly, but after changing another same demux, the channel 0 was still locked.