Password

  MEMO CARDs offer a protection attribute which controls read- and/or write-access to the MEMO CARD. If the attribute is set, a user password has to be typed before the secured function is available. A "master" password allows authorized persons to read the "user" password and to change this.

  The read- write protection is valid for the entire memory range. If one of the attributes is activated, the actual user password has to be prompted, otherwise the command is answered by an error command.

COMMAND DESCRIPTION

HEX code

Change user pass-word (Rel. 3.00 up)

66h

Set protection-attribute (Rel. 3.00 up)

67h

Read protection-attribute (Rel. 3.00 up)

69h

Change master pass-word (Rel. 3.00 up)

6ah

Read user pass-word (Rel. 3.00 up)

6bh

Reset protection attribute without storing it

6ch

Set Protection Attribute

  MEMO CARDs from release 3.0 and up has the feature of read- and write-protection. This command sets an attribute which controls read and write access to the inserted MEMO CARD. The factory preselection is "no protection"-"N".

  The read- write protection is valid for the entire memory range. If one of the attributes is activated, the actual user pass word has to be prompted, otherwise the command is answered by an error command.

COMMAND-telegram

HEX code

COMMAND 67h

66h

Set protection-attribute

(1Fh 67h 09h DATA1-8 DATA9 CS 04h)

DATA1 - 8

user pass word

DATA9

attribute

ATTRIBUTE

HEX code

A

all protected (read and write)

R

read protected

W

write protected

N

no protection (preselected)