Matrix Orbital LK204-7T-1U - Manual (Page 30)

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Table 20: Lock Parameters
Reserved Place holders only, should be 0
Address Locks the Baud Rate and I2C address
Setting Locks all settings from being saved
Command Locks all commands, text can still be written
Display Locks entire display, no new text can be displayed
8.3 Set and Save
Data Lock Dec
Hex
ASCII 254 203 245 160
FE CB F5 A0
■ ╦ ⌡ á
Level
Level
Level v5.0
Locks certain aspects of the display to ensure no inadvertent changes are made. The lock is not affected by a
power cycle. A new level overrides the old, and levels can be combined. Default is 0.
Level Byte See Data Lock Bits table.
6.9 Miscellaneous
9.1 Write
Customer Data Dec
Hex
ASCII 254 52
FE 34
■ 4
Data
Data
Data v5.0
Saves a user defined block of data to non-volatile memory. Useful for storing display information for later use.
Data Byte [16] User defined data.
9.2 Read
Customer Data Dec
Hex
ASCII 254 53
FE 35
■ 5
v5.0
Reads data previously written to non-volatile memory. Data is only changed when written, surviving power cycles.
Response Byte [16] Previously saved user defined data.
9.3 Read Version
Number Dec
Hex
ASCII 254 54
FE 36
■ 6
v5.0
Causes display to respond with its firmware version number. Test.
Response Byte Convert to hexadecimal to view major and minor revision numbers.
9.4 Read
Module Type Dec
Hex
ASCII 254 55
FE 37
■ 7
v5.0
Causes display to respond with its module number.
Response Byte Module number, see Sample Module Type Responses for a partial list.
Table 21: Sample Module Type Responses
2B LK204-7T-1U 2C LK204-7T-USB