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LMP91300: Problem with reading LMP91300 SWIF data

Part Number: LMP91300

Hi Expert,

We have LMP91300 which we are connecting with MSP430 launchpad through SWIF connection.

I am facing few difficulties with connection, please have a look.

  • When the LMP91300 SWIF_EVM is connected to a PC in the UI, it shows that the MSP430 Board is connected. However, when reading a default register value, it shows 0x00. When writing a value in the register for the CFA capacitor and setting the Rp value, this value is not written. When reading the resistor value again, it still shows 0x00. Sometimes, the default all register value read is 0x08.
  • As per the attached image, when the device is connected and reading or writing register value

Also find the attached image, while reading default value.

  • When the default value is reading, LED is blinking. Again with the same connection, after 1-2 minute when trying to read data again not getting any response from LMP91300. 
  • What could be the possible reason of this kind of behavior? Please help me out.