I'm trying to experiment with the 7816's CHSIGN register on the eval board with the eval s/w. Regardless of whether I write 0x41ff or 0x1ff to the COMPMODE register, the CHSIGN registers always seem to monitor channels A-C.
When I flip a CT connected to Channel E, I can see the corresponding real and reactive power registers go negative, but it never shows up in CHSIGN. If I flip a CT connected to Channel B, CHSIGN reads back 0x22 regardless of whether COMPMODE is set to 0x41ff or 0x1ff.
Any ideas on what I'm doing wrong?