9.3 Data Lock
Syntax
Hexadecimal 0xFE 0xCA 0xF5 0xA0 [level]
Decimal 254 202 245 160 [level]
Parameters
Parameter Length Description
level 1 Sets the data lock level
Description
Paranoia allows you to lock the module from displaying information, as
well as enables the protection of the ?lesystem and module se
ttings.
Each bit corresponds corresponds to a different lock level,
while
sending a zero will unlock your display as the following tables explains:
Bit
Data Lock Level
Description
0-2
Reserved
Should be left 0
3
Communication
Speed Lock
When this bit is set (1) the
Baud Rate and I2C Slave
address are locked
4
Setting Lock
When this bit is set (1)
the display settings such
as backlight, contrast and
GPO settings are locked.
(Internal EEPROM)
5
Reserved
Should be left 0
6
Command Lock
When this bit is set (1) all
commands but commands
202/203 are locked. (cmd
lock)
7
Display Lock
When this bit is set (1) the
module is locked from dis-
playing any new informa-
tion. (text lock)
NOTES
?
Sending a new data lock level will override the previous data
lock level.
?
Data lock levels may be combined.
Remembered Always
Default 0
Examples
Hex
Dec
Binary
Description
0x00
0
0
Unlock
0x50
80
01010000
Setting and Command Lock
Matrix Orbital LCD2041
38