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Results tagged with memory
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user 111195
Consider instead more specific tags, e.g., dram, sram, flash
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Understanding pull-up resistors and the 7489 memory chip
I have been learning about the 7489 memory chip. I had two of these that turned out to be broken (see here for previous question on this). I got more and I have finally gotten everything to work. …
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Why are two LEDs on? is 7489 broken?
This is a follow up question to this question.
I have attempted to draw a schematics of my setup for the 7489 below. Without the switch closed, the LED D1 is on. Then the switch is closed, then also …
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Schematics for using IC 7489 memory
I bought two SN7489 because I wanted to learn how the memory chip works. I followed the datasheet. I don't seem to be able to get it to work. … Pins 2 and 3 (the write and memory enable) I have (with jumper wires) attached to ground and/or +5V. …
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