Linx Technologies HUM-xxx-DT - Manual (Page 18)

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Write Non-volatile Configurations - Command Code = 23
This command writes all of the configurations that are stored in the
module’s non-volatile memory.
This command follows the Parameters shown in Figure 24 with the
exception of Parameter 55. That byte is a read-only and is not included in
the Write command.
Once written, the non-volatile configurations can be read out immediately.
A power cycle is required for them to take effect.
The module uses the values in volatile memory during operation. The
module loads the values from non-volatile to volatile memory when it
initializes after power-up, so a power cycle is necessary for the module to
use the new values.
Read I/O Configurations - Command Code = 24
This command reads the configurations of a specific GPIO line from volatile
memory.
Parameter 1 is set to 0x00. Parameter 2 is the GPIO number to be queried,
where 0 corresponds to GPIO_0 and 7 is GPIO_7 and so forth.
The response returns four parameter bytes. Parameter 1 is set to 0x00
and Parameter 2 returns the GPIO number that is being read. Parameter
3 returns the Analog / Digital configuration (digital = 0, analog = 1) and
Parameter 4 returns the Input / Output configuration (input = 0, output = 1).
Parameter 5 indicates if the read command was successful (00) or if there
was an error (01).
Write Non-volatile Configurations Command and Response
Command
Start Command Param 1 ... Param 54 End
3C 23 DType ... Rsv 3E
Response
Start Response Param 1 End
3C 23 Status 3E
Figure 27: Write Non-volatile Configurations Command and Response Figure 28: Read I/O Configurations Command and Response
Read I/O Configurations Command and Response
Command
Start Command Param 1 Param 2 End
3C 24 00 GPIO 3E
Response
Start Response Param 1 Param 2 Param 3 Param 4 Param 5 End
3C 24 00 GPIO ADCfg IOCfg Status 3E