Artesyn COMX-P4080 Installation and Use (August 2014) - Manual (Page 97)

BSP Operations
COMX-P4080 COM Express Module Installation and Use (6806800L20C) 97
The following is a NOR Flash operation example that upgrades the U-Boot.
tftpboot $loadaddr $ubootfile; protect off 0xeff00000 +$filesize;
erase 0xeff00000 +$filesize; cp.b $loadaddr 0xeff00000 $filesize;
protect on 0xeff00000 +$filesize;
7.12 NAND Flash
The NAND Flash is Numonyx NAND08GW3B2CN6E which is 1 GB in size. It is attached to the
FCM on the local bus and works at 8-bit mode. Boot up message will appear as "NAND: 1024
MiB".
Each page contains 2,112 bytes, including 2048 bytes of data with 64 bytes spare. Each block
contains 64 pages, including 128 KB of data with 4 KB spare, making a total of 8192 blocks.
For more information on the NAND Flash and its memory map, see Table "NAND Flash Map" on
page 75 .
protect on start +len Protects flash from address "start" to end of section with address
"start"+"len"-1
protect on all Protects all flash banks
protect off start end Makes flash from address "start" to address "end" writable
protect off start +len Makes flash from address "start" to end of section with address
"start"+"len"-1 writable
protect off all Makes all flash banks writable
erase start end Erases flash from address ’start’ to address ’end’
erase start +len Erases flash from address ’start’ to the end of section with address
’start’+len-1
erase all Erases all flash banks
Table 7-5 NOR Flash Command Usage (continued)
Command Description