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Since the PIA has two and I think the is the same thingthat makes for four addresses. An alternative solution — besides a jumble of jumpers on top of jumpers — would be to redefine the pinout by turning the chip upside down, and then bending the pins around or soldering to some sort of adapter.

The idea for use like on a parallel printer, where you write to the port for example, one line tells the printer, “I have new data for you,” and the printer takes it and uses the other line to say, “Thanks.

74HC Datasheet, PDF – Qdatasheet

I found a datasheet at http: You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum. So going off this example: That doesn’t mean you have to give it only four addresses. Users browsing this forum: Imagine that this responsive data-sheet is included in the product page of your webshop.


More Sharing Services Share. The brand’s unique identifier for a product. Login or signup for Full Icecat to access all product specs. Speaking of vagaries of VIA usage, this computer my KimKlone has opcodes that talk to one of a VIA’s bit counters, rendering it part of the programming model. Moreover, I needed the counter to increment, not decrement– again, something you won’t find on the data sheet! Previous topic Next topic. Product name is a brand’s identification of a product, often a model name, but not totally unique as it can include some product variants.

But the data-sheet is not yet standardized by an Icecat editor. Offhand, I’d say you made the right choice! If you do give it more, the four you need will get reflected in other addresses; but if you don’t use them, it does not cause any problems. Some manufacturers license their brand names to other producers.

74HCT640 Datasheet PDF

So, I used an inverting bus tranceiver 74HCT to connect it 74hxt640 the rest of the system. Download the free Open Icecat data-sheets. You can give it a lot more to make your address decoding hardware simpler and just not use more than four.

Add to compare Don’t compare Add to compare You 74hdt640 only compare products that are fully described in the Icecat standard format, and belong to the same category. Multiple product codes can be mapped to one mother product data-sheet if the specifications are identical.


IC, 74HCT CMOS, 74HCT, DIP20, 5V | View product | Farnell | Online shop – Comet Electronics

I dataheet that the little proto-board project that I did with the about 27 years ago! JPG You do not have the required permissions to view the files attached to this post. Product name is a key part of the Icecat product title on a product data-sheet. Page 2 of 2. Category Does not fit in any category. Sorry, this information is not published yet! Embed the product datasheet into your content.

Sacramento, CA, United States. Mon Dec 31, 2: I like how you fixed it in software! I’m ready for another byte.

Sat Aug 03, Thanks for looking that up for me, Garth. Here’s what I get from page 10 of the http: What type of chip would be good for an FDC. You won’t find that on a data sheet! Bit 0 ie, the bit whose value is 1, the number you put in your first line has to do with enabling interrupts caused by an active edge on CA1; so that’s not what you want right now.