MPL3115A2 register INT_SOURCE

[dkh]

I’m trying to understand a little about the MPL3115A2 pressure sensor we are using.

Section 13.11, INT_SOURCE (0x12), second paragraph: “The setting of the bits is rising edge sensitive, the bit is set by a low to high state change and reset by reading the appropriate source register”.

What does this mean for the SRC_PW and SRC_TW bits, i.e., what is the source? Does this mean to reading this register (INT_SOURCE) will clear these bits, or must I read another “source” register?

[dkh]

So, reading the output for the pressure clears the PTH bit as well ?

[miguelsalhuana]

Yes for the pressure interrupts reading OUT_P_MSB register will clear the interrupt. For the temperature interrupts reading OUT_T_MSB register will clear the interrupts.

[miguelsalhuana]

The source is the Pressure and Temperature output registers. Once the interrupt is asserted it is cleared by reading the appropriate output register. For Pressure interrupts this would be OUT_P_MSB and for Temperature interrupts it would be OUT_T_MSB

Regards,

Miguel