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Documentation inconsistencies: C5504 datasheet memory map summary

John Fisher
Expert 1030 points

Figure 3-1 of sprs659e shows SARAM size as 200K. Everywhere else in the datasheet it's stated to be 192K. Which is correct?

The block size of the External-CS0 space is shown as 8M minus 264K, yet the byte addresses are 800000h - 50000h which is 8M minus 320K.

  • 0
    TI__Mastermind 23785 points

    John,

    Thanks for pointing it out. The SARAM size should be 192K. We will update it.

    The block size address for the External-CS0 is correct. It is the same as C5505. But we only guarantee the stated block size for C5504.

    Regards.

  • 0 in reply to Steve Tsang
    Expert 1030 points

    Steve,

    Thank you for your clarification of the SARAM size.

    Steve Tsang said:

    The block size address for the External-CS0 is correct. It is the same as C5505. But we only guarantee the stated block size for C5504.

    I don't understand these sentences. For External-CS0, either the CPU byte addresses must be wrong, or the block size must be wrong. I don't know what you mean here by "block size address". That terminology is not used in the memory map summary.

  • 0 in reply to John Fisher
    TI__Mastermind 23785 points

    I was referring to both. The CPU address is 010000h to 040000h. The block size is 192 Bytes.

    Regards.

  • 0 in reply to Steve Tsang
    Expert 1030 points

    There is some failure to communicate going on in the above discussion. I have pointed out two inconsistencies in the documentation. One concerned the SARAM size, the other concerned the size of the External-CS0 space.

    With the SARAM size the inconsistency is between between the memory map summary and the rest of the datasheet.Steve has resolved this with his first response and the answer was 192K. Thank you Steve.

    The other inconsistency is internal to the memory map summary. The cpu byte address column in the diagram shows the external-CS0 space running between 800000h and 50000h. The block size column in the very same diagram shows the external-CS0 space size as 8M minus 264K. Now 800000h is 8M, but 50000h is 320K not 264K. Is this second inconsistency now understood?

  • 0 in reply to John Fisher
    TI__Mastermind 23785 points

    Yes. It should be 8M Minus 320K Bytes. I will have it updated also.

    Regards.