Question
STPM3x getting default register values via SPI
STPM3x chips are used for developing a multi-phase power-metering application.
Boards used: EVALSTPM3x-PH, Nucleo-F302R8,
I have ensured the correct initialization of SPI and chip reset at startup ( SCS low, 3 SYN pulses and 1 SCS pulse).
Been sending correct frames with a request to only read the default contents of internal registers on MOSI, always with a correct CRC byte at the end.
However on MISO I am receiving the same default value of the first internal register: 040000A0, regardless of which register I am trying to access.
What can be the issue here?
A snapshot from logic analyzer:
