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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_number/full | set_number/read | set_password/enabled |
       set_password/full | set_password/read | use_number/full |
       use_number/read | use_password/full | use_password/read |

       See the file man3/standard_mini.3so.

       ]]


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_password/xxx will change these values as well.


STANDARD PROPERTIES

       See the file man3/standard.3so.


ALARMS

       None.


DESCRIPTION

       See the file man3/description.3so.

   DS1977
       The DS1977 (3) is an iButton with static memory that is optionally
       protected by a password.


ADDRESSING

       See the file man3/addressing.3so.


DATASHEET

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


SEE ALSO

       See the file man3/seealso.3so.


AVAILABILITY

       http://www.owfs.org


AUTHOR

       Paul Alfille (paul.alfille@gmail.com)

OWFS Manpage                         2003                            DS1977(3)

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