-
Categories
-
Platforms
-
Content
I'm mot sure you can do this in an easy way, since each output only has 7 or 8 product terms. Is there a special reason you need to do this big task on a tiny chip?
If I should do this with 'logic', I would use a couple of old eproms, like 27c16, and just program them with the correct pattern. You could even use 3 eproms and get ready 7-segment outputs directly to the LEDs.
TOK
I'm mot sure you can do this in an easy way, since each output only has 7 or 8 product terms. Is there a special reason you need to do this big task on a tiny chip?
If I should do this with 'logic', I would use a couple of old eproms, like 27c16, and just program them with the correct pattern. You could even use 3 eproms and get ready 7-segment outputs directly to the LEDs.
TOK
well I'm making a relay computer and I want to take the 9Bit output and display it on 3 7-segment displays.
If you only need to look at the 9bit binary value, use 3 normal 7segment decoder chips. Or you can of course use 3 of the GALs for this, but a 3bit to 7segment decoder is a bit overkill if you don't have them around. You should be aware of the the GAL chips normally use a lot of current, if you don't have some of the old very lowpower variants.
Since you said BCD in the first post, I read it like you wanted a 9bit to 3 digit BCD decimal display.
TOK
Since you said BCD in the first post, I read it like you wanted a 9bit to 3 digit BCD decimal display.
TOK
Ok, so we're down to what you want displayed. If you want to display the 9bit BINARY value into a DECIMAL presentation, like 000 to 511, you need to convert the value to a 3 digit BCD.
If you on the other hand can cope with the 9bit BINARY to a 3 digit OCTAL presentation, like 000 to 777, you only need 3 ordinary BCD to 7segment drivers, with a 0 to 7 displayed in each digit.
You can also use 3(2.5) x 4bit to 7segment hex drivers to display a hexadecimal value from 000 to 1FF.
For the 2 driver type solutions, you can program a number of 22v10 chips to do the 3/4bit to 7 segment conversion.
For the binary to decimal solution you also need a 9bit binary to 3 digit BCD converter in addition to the 7 segment drivers.
Depending on the type of assignment this is, you have several possibilities.
TOK
If you on the other hand can cope with the 9bit BINARY to a 3 digit OCTAL presentation, like 000 to 777, you only need 3 ordinary BCD to 7segment drivers, with a 0 to 7 displayed in each digit.
You can also use 3(2.5) x 4bit to 7segment hex drivers to display a hexadecimal value from 000 to 1FF.
For the 2 driver type solutions, you can program a number of 22v10 chips to do the 3/4bit to 7 segment conversion.
For the binary to decimal solution you also need a 9bit binary to 3 digit BCD converter in addition to the 7 segment drivers.
Depending on the type of assignment this is, you have several possibilities.
TOK
You did read the information in the link I posted, right?
Is this an actual assignment or just your own idea?
The 22v10 has not enough basic capacity to do this this task. It has only 10 macrocells, each with 7 or 8 product terms. If you put a number of GALs together you may manage it, eventually. But I'm far from certain you will succeed.
If it's just for fun, I would have used some eproms to do it, but that's me. As long as you don't want to use a microprocessor/ controller, it will take some elbow grease to do it, however you do it.
TOK
