Questions tagged [addressing]

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Mapping address ranges in Verilog

In Verilog, what techniques can be use for mapping an address bus onto different memory modules. Typical case: a microprocessor core whose address space is mapped to various memory modules: RAM, ROM, ...
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mapping non existent addresses?

"In terms of this picture of mapping addresses from the address space onto the actual memory locations, a 4-KB machine without virtual memory simply has a fixed mapping between the addresses 0 to 4095 ...
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3answers
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address field and words of memory

"Consider as an example a typical computer of that era which might have had a 16 bit address field in its instructions and 4096 words of memory.A program on this computer could address 65536 words of ...
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What does address like 0xABCD_EFGH means in a memory map?

What does an address like 0xABCD_EFGH means in a memory map? I am new to programming microcontrollers, so please excuse me if its a bit lame. What does one mean by "123 Data Input Registers (GPDI0_3–...
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How is this EEPROM fully addressable?

I am looking at the datasheet for this 64k EEPROM, and I am having trouble understanding how to use it. I would like to do a lookup from a 16-bit address to an 8-bit data word. The chip only has 13 ...
2
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3answers
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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. Why ...
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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 ...
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Confused about I2C addressing in PCA8574/74A

The datasheet for the NXP PCA8574/74A contains the following line on addressing (p.6): When AD2, AD1 and AD0 are held to VDD or VSS, the same address as the PCF8574 or PCF8574A is applied. I'm ...

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