ADE7754 Analog Devices, ADE7754 Datasheet - Page 43

• Manufacturer Part Number: ADE7754
• Description: Poly-phase Multi-Function Energy Metering IC with Serial Port
• Manufacturer: Analog Devices

Interrupt Status Register (10h) / Reset Interrupt Status Register (11h)
The Interrupt Status Register is used to determine the source of an interrupt event. When an interrupt event occurs in the
ADE7754, the corresponding flag in the Interrupt Status Register is set logic high. The IRQ pin will go active low if the
corresponding bit in the Interrupt Mask register is set logic high. When the MCU services the interrupt, it must first carry
out a read from the Interrupt Status Register to determine the source of the interrupt. All the interrupts in the Interrupt Status
Register stay at their logic high state after an event occurs. The state of the interrupt bit in the Interrupt Status register is reset
to its default value once the Reset Interrupt Status register is read.
Bit
Location
0
1
2
3
4
5
6
7
8
9
Ah
Bh
Ch
D h
E h
F h
REV. PrG 01/03
(End of the LAENERGY and LVAENERGY accumulation)
Interrupt
Flag
AEHF
SAGA
SAGB
SAGC
ZXTOA
Z X T O B
ZXTOC
ZXA
Z X B
Z X C
LENERGY 0
RESET
PKV
PKI
W F S M
VAEHF
(Apparent Energy Register Half Full)
(Current channel Peak detection)
(Voltage channel Peak detection)
(New Waveform Sample Ready)
Default
Value
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
LENERGY
PRELIMINARY TECHNICAL DATA
VAEHF
RESET
WFMP
PKV
PKI
Event
Description
Indicates that an interrupt was caused by the 0 to 1 transition of the MSB of the AENERGY
register (i.e. the AENERGY register is half-full)
Indicates that an interrupt was caused by a SAG on the line voltage of the Phase A
Indicates that an interrupt was caused by a SAG on the line voltage of the Phase B
Indicates that an interrupt was caused by a SAG on the line voltage of the Phase C
Indicates that an interrupt was caused by a missing zero crossing on the line voltage of the
Phase A
Indicates that an interrupt was caused by a missing zero crossing on the line voltage of the
Phase B
Indicates that an interrupt was caused by a missing zero crossing on the line voltage of the
Phase C
Indicates a detection of rising zero crossing in the voltage channel of the phase A
Indicates a detection of rising zero crossing in the voltage channel of the phase B
Indicates a detection of rising zero crossing in the voltage channel of the phase C
In Line energy accumulation, it indicates the end of an integration over an integer number
of half line cycles (LINCYC) —see Energy Calibration
Indicates that the ADE7754 has been reset
Indicates that an interrupt was caused when the selected voltage input is above the value
in the PKVLV register.
Indicates that an interrupt was caused when the selected current input is above the value
in the PKILV register.
Indicates that new data is present in the Waveform Register.
Indicates that an interrupt was caused by the 0 to 1 transition of the MSB of the
VAENERGY register (i.e. the VAENERGY register is half-full)
0
F
*Register contents show power on defaults
0
E
Table XVII STATUS Register
0
D
0
C
0
B
INTERRUPT STATUS REGISTER*
0
A
–43–
9
0
8
0
0
7
0
6
0
5
0
4
0
3
0
2
1
0
0
0
ADDR: 10h
AEHF
(Active Energy Register Half Full)
SAG
(SAG Event Detect)
ZX
(Zero Crossing Time out Detection)
ZX
(Zero Crossing Detection)
ADE7754