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DS1977(3)		     One-Wire File System		     DS1977(3)

NAME
       DS1977 - Password Protected 32kbit Memory iButton

SYNOPSIS
       Non-volatile memory.

       37  [.]XXXXXXXXXXXX[XX][/[  memory  | pages/page.[0-510|ALL] | set_num‐
       ber/full | set_number/read | set_password/enabled | set_password/full |
       set_password/read  |  use_number/full  |	 use_number/read  |  use_pass‐
       word/full | use_password/read | ]]

FAMILY CODE
       37 DS1977

SPECIAL PROPERTIES
   memory
       read-write, binary
       32704 bytes of memory. Possibly protected by a password.

   pages/page.0 ... pages/page.510 pages/page.ALL
       read-write, binary
       Memory is split into 511 pages of 64 bytes each.	 ALL is	 an  aggregate
       of the pages. Each page is accessed sequentially.

   set_number/full set_number/read
       write-only, ascii
       Passwords   entered   as	 numbers,  either  decimal,  or	 hex  of  form
       0x0123456789ABCDEF. Handled the same as set_password/xxx

   set_password/enable
       read-write, yes-no
       Turn on/off password protection for the DS1977, or return  the  current
       state.

   set_password/full set_password/read
       write-only, binary
       Passwords  (8 byte values) that allow read or full access to the DS1977
       memory. The password set by set_password/xxx are stored in  the	DS1977
       and  locally  in	 the  program as well (as if use_password/xxx was also
       called).

   use_password/full use_password/read
       write-only, binary
       Passwords (8 byte values) that allow read or full access to the	DS1977
       memory. The password set by

   use_number/full use_number/read
       write-only, ascii
       Passwords   entered   as	 numbers,  either  decimal,  or	 hex  of  form
       0x0123456789ABCDEF. Handled the same as use_password/xxx

   use_password/full use_password/read
       write-only, binary
       Passwords (8 byte values) that allow read or full access to the	DS1977
       memory.	The password set by use_password/xxx are stored in the program
       and must match the passwords stored in the DS1977. Changing the	DS1977
       passwords  using	 set_password/xxx  will	 change	 these values as well.
       use_password/xxx are stored in the program and must match the passwords
       stored  in  the	DS1977.	 Changing the DS1977 passwords using set_pass‐
       word/xxx will change these values as well.

STANDARD PROPERTIES
ALARMS
       None.

DESCRIPTION
   DS1977
       The DS1977 (3) is an iButton with static memory that is optionally pro‐
       tected by a password.

ADDRESSING
DATASHEET
       http://pdfserv.maxim-ic.com/en/ds/DS1977.pdf

SEE ALSO
AVAILABILITY
       http://www.owfs.org

AUTHOR
       Paul Alfille (paul.alfille@gmail.com)

OWFS Manpage			     2003			     DS1977(3)

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