NAND detection
Issue Read ID (ONFI) command
Issue Reset command
(max timeout 200ms)
Device ready
No
Yes
No
Success
Failed
No
Yes
Extract NAND parameters from table
Read Invalid Blocks
Information
Device ID
in the table?
Issue Reset command
Issue Read ID (standard) command
Device ready
No
Yes
Device replied (ONFI)?
Yes
Issue Read parameters page
command
Extract NAND parameters
from device parameters page
Update page size, block size, ECC
correction for devices > 1 Gb
Wait for device initialization
(max timeout 250ms)
Device ready
No
Yes
Timeout reached
Functional Description
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Figure 26-12. NAND Device Detection
The detection procedure is described in Figure 26-12. Once the device has been successfully detected,
the ROM Code changes GPMC to 16-bit bus width if necessary.
4124
Initialization SPRUH73H–October 2011–Revised April 2013
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