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Data Sheet
ADE7758
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
Bit
Default
Location
0 to 1
2 to 4
Mnemonic
PHSEL
WAVSEL
Value
0
0
Description
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
These bits are used to select the type of waveform.
WAVSEL[2:0]
Source
0
0
0
0
1
0
0
1
1
0
Others-
0
1
0
1
0
Current
Voltage
Active Power Multiplier Output
Reactive Power Multiplier Output
VA Multiplier Output
Reserved
5 to 6
7
DTRT
VACF
0
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)
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).
Rev. E | Page 65 of 72
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