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><H1
><A
NAME="FIS-UNLOCK-COMMAND">fis unlock</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN4257"
></A
><H2
>Name</H2
>fis unlock -- Unlock flash area</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN4260"><H2
>Synopsis</H2
><P
><B
CLASS="COMMAND"
>fis unlock</B
> {-f <TT
CLASS="REPLACEABLE"
><I
>flash_address</I
></TT
>} {-l <TT
CLASS="REPLACEABLE"
><I
>length</I
></TT
>}</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4267"
></A
><H2
>Arguments</H2
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN4269"><P
></P
><TABLE
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><THEAD
><TR
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Name</TH
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Type</TH
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Description</TH
><TH
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Default</TH
></TR
></THEAD
><TBODY
><TR
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="REPLACEABLE"
><I
>flash_address</I
></TT
></TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Number</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Address of area to be unlocked.</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
> </TD
></TR
><TR
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="REPLACEABLE"
><I
>length</I
></TT
></TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Number</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
>Length of area to be unlocked.</TD
><TD
WIDTH="25%"
ALIGN="LEFT"
VALIGN="TOP"
> </TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4294"
></A
><H2
>Description</H2
><P
>This command is used to unlock a portion of flash memory forcibly, allowing
it to be updated. It must be issued for regions which have been locked before
the FIS can reuse those portions of flash.</P
><DIV
CLASS="NOTE"
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>Note: </B
>Some flash devices power up in locked state and always need to
be manually unlocked before they can be written to.</P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4299"
></A
><H2
>Examples</H2
><P
>Unlock an area of the flash
<TABLE
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WIDTH="70%"
><TR
><TD
><PRE
CLASS="SCREEN"
>RedBoot> <TT
CLASS="USERINPUT"
><B
>fis unlock -f 0xa0040000 -l 0x20000</B
></TT
>
... Unlock from 0xa0040000-0xa0060000: .</PRE
></TD
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