inputs on the 74373

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tgraz34
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inputs on the 74373

Post by tgraz34 » Tue Oct 12, 2010 10:09 am

I was reading the 8x8 game system modifications topic it brought up a few questions in my mind. Brads newer/better schematic for the 8x8 game system only shows where the outputs of the 74373 go to the led matrix.

Im trying to figure out how to connect the inputs of the 74373's up to the pic chip. That part wasn't shown in the schematic. :?

Thanks :)

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Re: inputs on the 74373

Post by tgraz34 » Wed Oct 13, 2010 11:20 am

I think i found out how to connect the 74373's to the pic. It took some time because there are no individual connections in the schematics, its just data buses.

Im guessing that pin 13 of the pic chip connects to pin 3 of the 74373 and 12 to 4, 11 to 7 and so on. Can someone verify that?

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brad
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Re: inputs on the 74373

Post by brad » Wed Oct 13, 2010 3:03 pm

It is actually the opposite of what you have said. You want to match up D0 with D0, D1 with D1 and so on. So it is like this:

PIC | 74373
13 | 18
12 | 17
11 | 14
10 | 13
9 | 8
8 | 7
7 | 4
6 | 3
Last edited by brad on Thu Oct 14, 2010 7:21 pm, edited 1 time in total.

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Re: inputs on the 74373

Post by bitfogav » Thu Oct 14, 2010 3:20 am

brad wrote:It is actually the opposite of what you have said. You want to match up D0 with D0, D1 with D1 and so on. So it is like this:

PIC | 74373
13 | 18
10 | 17
11 | 14
10 | 13
9 | 8
8 | 7
7 | 4
6 | 3
Im not sure thats 100% correct Brad, you have used PIC connector 10 twice?. :)

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brad
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Re: inputs on the 74373

Post by brad » Thu Oct 14, 2010 7:18 pm

Oops!

I have changed the previous post so it is now correct :)

tgraz34
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Re: inputs on the 74373

Post by tgraz34 » Sat Oct 16, 2010 10:48 pm

Now what about the connections from the 74373's to the led matrix. There arnt any pin numbers or notches on the 74373 in your newer/better schematic.

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