[U-Boot-Users] Cannot erase flash sector

[Joe Culler]

Hi there,

I have a question about erasing flash sectors, please tell me what
steps I did wrong,
thank you.

The following is my boad using u-boot command "flinfo":
Bank # 1: SGS Thomson PSD4256G (1 M, uniform sector)
  Size: 1 MB in 16 Sectors
  Sector Start Addresses:
    20000000 (RO) 20010000 (RO) 20020000      20030000      20040000
    20050000      20060000      20070000      20080000      20090000
    200A0000 E    200B0000 E    200C0000 E    200D0000 E    200E0000 E
    200F0000 (RO)

If I want to erase sector from 20020000 to 20090000 for example, I use
the command
"erase 20020000 2009ffff" to erase flash, it seems to be ok from erase message:

Erase Flash from 0x20020000 to 0x2009ffff
.............. done
Erased 8 sectors

But when I use "flinfo" command to see whether those sectors are
erased or not, it shows
the same above message:
Bank # 1: SGS Thomson PSD4256G (1 M, uniform sector)
  Size: 1 MB in 16 Sectors
  Sector Start Addresses:
    20000000 (RO) 20010000 (RO) 20020000      20030000      20040000
    20050000      20060000      20070000      20080000      20090000
    200A0000 E    200B0000 E    200C0000 E    200D0000 E    200E0000 E
    200F0000 (RO)

If I understand correct, sectors from 20020000 to 20090000 should be
displayed (E),
but those aren't. I don't know what step I did wrong.

Regards,
Joe.