Part Number: LP5012
Hi support team,
LP5012RUKR is used by incorporating it in the sub board.
If the power supply is stopped due to poor contact with the main board, I think that communication will not resume unless it is restored by the sequence shown in the figure below.
However, since there is no mechanism to determine the necessity / unnecessity of initial communication between the main and sub boards, there is a problem that the LED does not light once a contact failure occurs.
On the main board side where the microcomputer is located, it is not possible to determine whether a communication failure with the LED driver has occurred.
Therefore, when I set the OUTx_COLOR register while continuing to send INITIALIZATION at a cycle of 0.1ms, it seems that it is working without any problem.
So I have questions.
(1)
If the command is sent in the order of INITIALIZATION → OUTx_COLOR setting → INITIALIZATION, is there any change in the internal state of the LED driver?
Apparently, INITIALIZATION (LED not lit) → OUTx_COLOR setting (LED lit) → INITIALIZATION (LED lit)
It looks like there is no problem.
(2)
If I send commands in the order of INITIALIZATION → OUTx_COLOR setting → INITIALIZATION and there is a change in the internal state of the LED driver, are there any concerns to assume?
At first glance, there seems to be no problem, but I am worried that the current consumption will increase or the LED will turn off without permission.
(3)
Are there any concerns if the INITIALIZATION command is repeatedly sent, such as with a 0.1ms cycle?
I think it is unexpected that the INITIALIZATION command is sent repeatedly, but if there is no problem, I would like to consider sending it repeatedly.
Regards,
Dice-K
