Datasheet

Data Sheet ADE7758
Rev. E | Page 65 of 72
WAVEFORM MODE REGISTER (0x15)
The waveform sampling mode of the ADE7758 is defined by writing to the WAVMODE register. Table 20 summarizes the functionality of
each bit in the WAVMODE register.
Table 20. WAVMODE Register
Bit
Location
Bit
Mnemonic
Default
Value
Description
0 to 1 PHSEL 0 These bits are used to select the phase of the waveform sample.
PHSEL[1:0] Source
0 0 Phase A
0 1 Phase B
1 0 Phase C
1 1 Reserved
2 to 4 WAVSEL 0 These bits are used to select the type of waveform.
WAVSEL[2:0] Source
0 0 0 Current
0 0 1 Voltage
0 1 0 Active Power Multiplier Output
0 1 1 Reactive Power Multiplier Output
1 0 0 VA Multiplier Output
Others- Reserved
5 to 6 DTRT 0 These bits are used to select the data rate.
DTRT[1:0] Update Rate
0 0 26.04 kSPS (CLKIN/3/128)
0 1 13.02 kSPS (CLKIN/3/256)
1 0 6.51 kSPS (CLKIN/3/512)
1 1 3.25 kSPS (CLKIN/3/1024)
7 VACF 0
Setting this bit to Logic 1 switches the VARCF output pin to an output frequency that is
proportional to the total apparent power (VA). In the default state, Logic 0, the VARCF pin outputs
a frequency proportional to the total reactive power (VAR).