Hi Joseph,
K63 product doesn't have NAND flash controller, customer can select to use K60_100MHz product or K60_120MHz product for NAND flash access.
I get following data about Kinetis NAND Flash performance:
Write a page:
- NAND device write page typical time ~220us, max (Worst case) ~500us (tProg in Micron spec)
This time does not include data from NFC buffer to NAND device, this is the time that NAND device needs to program the array (2K+64).
- Move from NFC buffer to NAND: 2112 bytes @ NFC flash clock
- ECC is performed on the fly, so no ECC timing for encoding
- DMA data to NFCBuffer from CPU internal: 2048 + 64 @ CPU clock (11 CPU clock cycle every 32 bytes, 726 CPU clock cycles per page 2112 bytes)
Timing for a page write from CPU to NAND device till DONE bit is
:<DMA time @ CPU clock> + <NAND write command> + <NAND address command> + <DATA transfer @ flash clock> + <NAND device write page time>
So, min time will be: <726 * 10.42> + ~2us + ~2us + <2112 * 38.4> + ~220us = ~313us
And, worst time will be: <726 * 10.42> + ~2us + ~2us + <2112 * 38.4> + ~500us = ~593us
That means the typical NAND Flash performance is 6.24MB/s, the worst performance is 3.29MB/s.
I am not sure how many data need to transfer from JPEG compression(DSP) every second.
I think using K60_120MHz product or K70 with DDR2 memory is a correct choice. The DDR2 memory clock could up to 150MHz.
Wish it helps.
best regards
Ma Hui
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
