All Questions
Tagged with memory integrated-circuit
33
questions
0
votes
0
answers
77
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SRAM not writing properly after radiation exposure
I have an SRAM memory device GM76C88AL with this datasheet. The RAM was exposed to a radioactive beta source (~2MeV) for some time (about 2 hours). The source was just right above it (placed on it), ...
- 1,163
0
votes
2
answers
95
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Is the communication between memory controller and RAM serial?
I used to think that the communication between memory controller and RAM is parallel since we know that a RAM stick has multiple pins, just like this:
But then, from Wikipedia article on memory ...
- 443
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0
answers
55
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Advice on SIPO FIFO clock, as well as 555 timer usage
I've made a circuit which involves me entering inputs, and the result being displayed in a seven segment LED. The LED must flash on and off and display the input number at least two times in two ...
- 37
3
votes
3
answers
1k
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What kind of IC is this, and how can I erase its memory to reuse it?
I have a PCB with an IC on it.
All I want is to erase its memory so that I can reuse the chip.
Any help with what sort of chip is this, or how I can erase the memory, would be very helpful.
- 67
1
vote
0
answers
239
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Memory Mapping Table
I am a begginer in the field of microcomputers and their architecture and recently I got an assignment with the following instructions:
With the use of the mapping table find out which adresses in ...
1
vote
1
answer
92
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Industry Standard for Memory Address Decoder Design
I am currently designing the address decoder of a piece of ReRAM that will be sent to TSMC and manufactured. I have studied in class and textbook that there are two common address decoder designs. One ...
- 15
0
votes
1
answer
125
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74ls279 SR latch not working
I am trying to get an 74ls279 SR latch to hold a state, but it's not working. I am using a full-size solderless breadboard, a 3V power supply, and an LED to view its state. The LED flickers and loses ...
- 390
1
vote
1
answer
120
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Is writing in FeRAM memory cell destructive?
I have read that writing in Ferroelectric random access memory is not destructive. But in a WL||PL memory architecture, if I try to write a '0' in a cell and the adjacent cell holds a '1', shouldn't ...
- 29
0
votes
1
answer
1k
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Combine two 8bit EEPROM to make 16bit EEPROM
I am working on building a computer out of logic chips.
I want to use an EEPROM as the instruction memory. However, my EEPROM's only has 8bits data output, but I want my instructions to be 16bits long....
- 139
3
votes
1
answer
570
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What's the difference between 1kb(64x16) and 1kb(128x8) for EEPROM memory size?
In addition to the question in the title, I have the following subquestions:
I'm guessing 64x16 means something like 64 cells of 16 bytes each. Is this accurate?
What is the significance (if any) of ...
1
vote
2
answers
2k
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Designing a RAM, using 4x2 chips, with a 8 address capacity
This is a typical exam question, and I've seen some very helpful posts about, but I still have a lot of doubts.
Given an integrated circuit of certain dimensions, for this example a 4x2, I have to ...
- 11
1
vote
0
answers
69
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How is CAM implemented?
I have a book statement:
A content addressable memory is a circuit that combines comparison and storage in a single device.
I want to know how this is implemented in real world? Sounds like an ...
- 221
0
votes
1
answer
190
views
Commercial SRAM with separate power supply for the core and peripheral?
Are there commercial SRAMs available with a separate power supply for the core transistors (6T) and a separate supply for the remaining circuitry such as the sense amps, write drivers, etc?
I believe ...
17
votes
2
answers
2k
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Parallel RAM without large number of pins?
Back in the 1970s, Texas Instruments had a now-discontinued range of products that they called GRAM (and read only equivalent GROM) which was basically a standard memory chip with address and data all ...
- 2,046
3
votes
1
answer
990
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How To Remove This from PCB
I was wondering how I could remove the silver (chip?) from the center of this PCB. It appears to be held down by that clear substance (epoxy?). The PCB is small, 2 cm sides (Not sure if relevant but ...
