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ADE7754
Interrupt Enable Register (0Fh)
When an interrupt event occurs in the ADE7754, the IRQ logic output goes active low if the enable bit for this event is Logic 1 in this
register. The IRQ logic output is reset to its default collector open state when the RSTATUS register is read. Table XVI describes the
function of each bit in the interrupt enable register.
Table XVI. IRQEN Register
Bit
Interrupt
Default
Location
0
Flag
AEHF
Value
0
Description
Enables an interrupt when there is a 0 to 1 transition of the MSB of the AENERGY register
(i.e., the AENERGY register is half-full).
1
2
3
4
5
6
7
SAGA
SAGB
SAGC
ZXTOA
ZXTOB
ZXTOC
ZXA
0
0
0
0
0
0
0
Enables an interrupt when there is a SAG on the line voltage of the Phase A.
Enables an interrupt when there is a SAG on the line voltage of the Phase B.
Enables an interrupt when there is a SAG on the line voltage of the Phase C.
Enables an interrupt when there is a zero-crossing timeout detection on Phase A.
Enables an interrupt when there is a zero-crossing timeout detection on Phase B.
Enables an interrupt when there is a zero-crossing timeout detection on Phase C.
Enables an interrupt when there is a rising zero crossing in voltage channel of the Phase A—
zero-crossing detection.
8
ZXB
0
Enables an interrupt when there is a rising zero crossing in voltage channel of the Phase B—
zero-crossing detection.
9
ZXC
0
Enables an interrupt when there is a rising zero crossing in voltage channel of the Phase C—
zero-crossing detection.
Ah
LENERGY
0
Enables an interrupt when the LAENERGY and LVAENERGY accumulations over LINCYC
are finished.
Bh
Reserved.
Ch
PKV
0
Enables an interrupt when the voltage input selected in the MMODE register is above the
value in the PKVLVL register.
Dh
PKI
0
Enables an interrupt when the current input selected in the MMODE register is above the
value in the PKILVL register.
Eh
Fh
WFSM
VAEHF
0
0
Enables an interrupt when a data is present in the waveform register.
Enables an interrupt when there is a 0 to 1 transition of the MSB of the VAENERGY register
(i.e., the VAENERGY register is half full).
INTERRUPT ENABLE REGISTER *
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
ADDR: 0Fh
VAEHF
(APPARENT ENERGY REGISTER HALF FULL)
WFSM
(NEW WAVEFORM SAMPLE READY)
PKI
(CURRENT CHANNEL PEAK DETECTION)
PKV
(VOLTAGE CHANNEL PEAK DETECTION)
LENERGY
(END OF THE LAENERGY AND LVAENERGY ACCUMULATION)
RESERVED
* REGISTER CONTENTS SHOW POWER-ON DEFAULTS
AEHF
(ACTIVE ENERGY REGISTER HALF FULL)
SAG
(SAG EVENT DETECT)
ZX
(ZERO-CROSSING TIMEOUT DETECTION)
ZX
(ZERO-CROSSING DETECTION)
REV. 0
–39 –
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