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 | ]]

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

ALARMS
None.

DESCRIPTION

  DS1977
The DS1977 (3) is an iButton with static memory that is optionally protected 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)