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hv5812 vfd driver function table

Franksterb92
Associate III

could someone explain how this chip works this functScreenshot 2023-12-30 01-46-02.pngion table is so confusing to me 

1 ACCEPTED SOLUTION

Accepted Solutions
AScha.3
Principal III

AScha3_0-1703945057506.png

...seems not difficult, you have to make connections to: (+vpp , vdd, gnd )

- data in

- clk

- strobe

- blanking

-> blanking : hi = display off ; lo = display on.

-> clk : on lo->hi transition data is shifted in; 

-> strobe :  lo->hi transition data is stored in latch;  lo->hi->lo to store data . 

So full sequence to show a pattern is:

( set data in hi or lo , switch clk lo->hi->lo ;  ) 20 x , for 20 bits /segments ;

set strobe lo->hi->lo ; = data is on outputs (+ blanking always lo, if you dont want switch off the display)

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View solution in original post

3 REPLIES 3
Peter BENSCH
ST Employee

Thank you very much for the trust you have placed in the community with your question, but it relates to a device from a manufacturer that is not STMicroelectronics. This can also be seen in the URL on your screenshot. I suspect that the question can be better answered by that supplier.

Good luck!
/Peter

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AScha.3
Principal III

AScha3_0-1703945057506.png

...seems not difficult, you have to make connections to: (+vpp , vdd, gnd )

- data in

- clk

- strobe

- blanking

-> blanking : hi = display off ; lo = display on.

-> clk : on lo->hi transition data is shifted in; 

-> strobe :  lo->hi transition data is stored in latch;  lo->hi->lo to store data . 

So full sequence to show a pattern is:

( set data in hi or lo , switch clk lo->hi->lo ;  ) 20 x , for 20 bits /segments ;

set strobe lo->hi->lo ; = data is on outputs (+ blanking always lo, if you dont want switch off the display)

If you feel a post has answered your question, please click "Accept as Solution".

So just Like the 74hc595 ok