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Results tagged with memory
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user 1657
Consider instead more specific tags, e.g., dram, sram, flash
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How does using memory with more bits allow you to reduce the address bus?
If you are using a CPU to address one 2MB memory module, then since 1MB = 220 and 2·220 = 221 = 2MB, you need 21 address lines. … If you use a 2MB 16-bit memory module instead, you can remove address line 0. Why is that? …
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This flash memory works without connection to a power source or gnd?
I am doing a project where I need to store information into flash memory and read it back using an mbed. …
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Are there datasheets for this dataflash memory?
It's hard to read what is written on this dataflash memory but it looks like 25p80vg. …
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2
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How likely is it that this chip was damaged?
I am trying to use a dataflash memory that requires a voltage of 2.7 to 3.6. Before I was supplying it with too little voltage. Then I supplied it with 5V. …
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Reducing the memory address bus by adding banks
If you are trying to control memory from a CPU, then if you use two banks instead of one, you can remove the first address line. If you use four banks, then you can also remove the second as well. …
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1
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281
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How to write data to this dataflash memory
I'm trying to write data to a W25P80 dataflash memory using an mbed. … So how is data written to the flash memory? …
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2
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How is the board connected to this chip?
I have a dataflash memory that is too small to fit on a prototype board, so it has been put on a small board. I am having trouble figuring out where pin 1 is on this board. … How do the lines connect to the memory? For the large circles on the right, how can they be connected to the chip if no lines can be seen going to them? …
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How to read this table in a datasheet
I'm trying to get the device ID out of dataflash memory using an mbed. I'm trying to understand this table that is in the documentation for the memory. … I understand that ABh, 90h, and 9Fh are the instructions that have to be sent to the memory to get the ID. What is listed under them? Are those the codes that will be returned? …
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5
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Does reset do the same thing as shutting off the power to this device and turning it back on?
I am trying to control a serial dataflash memory through an mbed. It is an AT45DB021B and the datasheet is here. It has a reset pin that I have wired to the mbed so that a software reset can be done. …
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2
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1
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How to read the device ID of a dataflash memory
I am trying to read the device ID of a serial flash memory by using the SPI connections on an mbed. In the datasheet for the serial flash memory W25Q80 there is this figure. …
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