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ADE7953
Apparent Energy No-Load Interrupt
Two interrupts are associated with the apparent energy no-load
feature: one for Current Channel A (phase) and one for Current
Channel B (neutral). If enabled, these interrupts are triggered when
the apparent energy falls below the programmed threshold.
The Current Channel A apparent energy no-load interrupt can be
enabled by setting the VA_NOLOADA bit (Bit 8) in the IRQENA
register (Address 0x22C and Address 0x32C). When this bit is set,
an apparent energy no-load event on Current Channel A causes
the IRQ pin (Pin 22) to fall to 0 (see the Primary Interrupts
(Voltage Channel and Current Channel A) section).
Data Sheet
The Current Channel B apparent energy no-load interrupt
can be enabled by setting the VA_NOLOADB bit (Bit 8) in the
IRQBENB register (Address 0x22F and Address 0x32F). When
this bit is set, an apparent energy no-load event on Current
Channel B triggers the IRQ alternative output (see the Current
Channel B Interrupts section).
Apparent Energy No-Load Status Bits
In addition to the apparent energy no-load interrupt, the ADE7953
includes two unlatched status bits that continually monitor the
no-load status of Current Channel A and Current Channel B.
The VANLOAD_A and VANLOAD_B bits are located in the
ACCMODE register (Address 0x201 and Address 0x301). These
bits differ from the interrupt status bits in that they are unlatched
and can, therefore, be used to drive an LED.
Rev. B | Page 42 of 72
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