1.7.8 PIC32CXMTC + MCP3913, PGA = 2, CH0: I_A, CH1: I_B, CH2: I_C, CH3: V_A, CH4: V_B, CH5: V_C

AFE_SELECTION = 0x00000004

AFE_CTRL_0 = 0x0E000049 (dithering: on, medium strength; boost: x2)

CHANNEL_MATRIX = 0xFF531420