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Strange data received from MAX31888.

Category: Datasheet/Specs
Product Number: MAX31888

We are working with MAX31888 sensor without problems.

Recently, we received a slot of MAX31888 (with different datecode), we found there are something strange.

The old MAX31888 data pattern is like:

RESET->PRESENCE-> SKIP ROM(0xCC) -> 0x33 -> 0x20 -> 0x03 , then receive 0xAA -> 0x0F -> 0x00

However, the new datecode slot MAX31888 data pattern is like:

RESET->PRESENCE-> SKIP ROM(0xCC) -> 0x33 -> 0x20 -> 0x03 , then receive 0xAA -> 0x07 -> 0x00

The data 0x07 should be referred to GPIO_CONTROL (0x21), correct?

If so, how come bit 1 and bit 3 are not the same? bit 1 and bit 3 are both refer to GPIO1_LL and should be the same value.

Please help and correct me if get something wrong.

Thanks!!