Operation of 2.3NandFlash

Operation of 2.3NandFlash

1.NandFlash classification:

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2.MLC and SLC comparison:

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3. Signal PIN:

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Nandflash's reading:

Page read: page address

Random read: Page address + column address

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Today is to implement page-reading: The address of the page is required.

Let's look at the chip manual k9f2g08u0a.pdf: Find out how the Eucalyptus leaf Read works:

Register Nfcont:

The "1" bit in this register:

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Here is the bit that selects the operation Nandflash:

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2. Nandflash's Statue Register:

   Fourth place:

   Clear RB: Fourth bit for 1 yes, clear RB.

4. Next is the Send action:

   Register:

6. Send:

8. Nfdata:

   Main method:

   Make: Compile

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   To implement the Nandflash read function, initialization must be performed: primarily two registers are initialized:

   We are primarily initializing the three parameters of this register: TACLS,TWRPH0,TWRPH1.

   The parameters are as follows: for our nandflash to work, we must meet his minimum value.

   Tacls=0ns

   Twfph0=12ns

   Twfph1=5ns

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   The value operation of the above three parameters:

   Our Nandflash use the HCLK, the frequency is 100MHz. The corresponding time for each tremor is 10ns (1/100mhz).

   It's got a tacls>0ns.

   Twfph0>12ns

   Twfph1>5ns's formula.

   To achieve duration=hclk*tacls=10ns*tacls>0, only need to take Tacls=1, you can.

   To implement Duration=hclk* (twrph0+1) =10ns* (twrph0+1) >12ns, you need only twrph0=2 to

   To implement Duration=hclk* (twrph1+1) =10ns* (twrph1+1) >5ns, only twrph1=1 is required.

   The next step is to initialize our Nfcont, disable first, and then enable the use.

   Operation of Reset:

   The next step is to test these functions.

   Solve the hidden dangers:

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Operation of 2.3NandFlash