how to create a BYTE ADDRESSABLE MEMORY ?

[PrashanthP]

Hello. 

I wanted to create a byte addressable memory in IPXACT with below code

Here width tells the number of bits per location. If width is 8 then is it byte addressable ?

And the total number of address locations are 2**10 (1024 locations starting from base address 0) ?

and what is the difference between addressable units and addressunitbits ?

[kock]

Hi Prashanth,

If you want a byte addressable memory then the addressUnitBits value shall be 8 (which is the default value). The number represents number of data bits in each address increment. Hence, the addressable unit is then a byte. The range describes the number of addressable units. The width describes the number of data bits that can be accessed in a single transaction.

Best regards,
Erwin

[PrashanthP]

hi erwin,

1. What does the field 'memoryMap' means ? 

2. what does the field 'addressBlock' means ? 

3. does addressblock creates memory or we need to explicitly add usage field for memory creation ?

4. what is the significance of field 'volatile' for memory ? what if it is set to true(defaults to false) ?

[kock]

Hi Prashanth,

Please refer to the IEEE standard document for all details. Basically a memory map is something that can be referenced from a target bus interface. An address block represents a contiguous block of memory in such a memory. You need such a block to describe a memory with its properties such as offset, range and width. Volatile means that the content of the memory can be changed in a way that is not described by IP-XACT.

Best regards,
Erwin