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TPS65381-Q1 SW_LOCK and SW_UNLOCK command

masahiko shimizu
Guru 11235 points
Other Parts Discussed in Thread: TPS65381-Q1

Hi

My customer is using TPS65381-Q1.
He has a question about SW_LOCK and SW_UNLOCK command.

If SW_UNLOCK command with data 0xAA is sent, TPS65381-Q1 become SW_LOCK.
This is suggested in 5.5.6 SPI Command Table of TPS65381-Q1 datasheet.

But the sample program given from TI suggests that data 0x55 is SW_UNLOCK.
This sample program image is attached.

Which data value(0x55 or 0xAA) should I send to TPS65381-Q1 when I become TPS65381-Q1 to SW_UNLOCK?
and could you also tell me the data value which should be sent in the SW_LOCK case?

Best regards
Shimizu