ade7756arsrl Analog Devices, Inc., ade7756arsrl Datasheet - Page 31

• Manufacturer Part Number: ade7756arsrl
• Description: Active Energy Metering Ic With Serial Interface
• Manufacturer: Analog Devices, Inc.

Interrupt Status Register (04H) / Reset Interrupt Status Register (05H)
The Status register is used by the MCU to determine the source of an interrupt request (IRQ). When an interrupt event occurs in the
ADE7756, the corresponding flag in the Interrupt Status register is set logic high. If the enable bit for this flag is Logic 1 in the Inter-
rupt Enable register, the IRQ logic output goes active low. 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.
Bit
Location
0
1
3
4
5
7
Interrupt
Flag
AEHF
SAG
WSMP
ZX
TEMP
AEOF
Table VII. Interrupt Status Register, Reset Interrupt Status Register and Interrupt Enable Register
(ACTIVE ENERGY REGISTER OVERFLOW)
(ACTIVE ENERGY REGISTER OVERFLOW)
Description
Indicates that an interrupt was caused by the 0 to 1 transition of the MSB of the Active Energy register.
Indicates that an interrupt was caused by a SAG on the line voltage or no zero crossings were detected.
In calibration mode this flag is also used to indicate the end of an integration over an integer number of
half line cycles—see Energy Calibration section.
Indicates that new data is present in the Waveform register.
This status bit reflects the status of the ZX logic output—see Zero Crossing Detection section.
Indicates that a temperature conversion result is available in the Temperature register.
Indicates that the Active Energy register has overflowed.
REGISTER CONTENTS SHOW POWER-ON DEFAULTS
REGISTER CONTENTS SHOW POWER-ON DEFAULTS
RESERVED = 0
RESERVED = 0
AEOF
TEMP
AEOF
TEMP
ZX
ZX
0
0
7
7
INTERRUPT ENABLE REGISTER
INTERRUPT STATUS REGISTER
6
0
6
0
5
0
5
0
4
0
4
0
3
0
3
0
2
0
2
0
1
0
1
0
0
0
0
0
ADDR: 04H / RESET: 05H
ADDR: 10H
AEHF
(ACTIVE ENERGY REGISTER HALF FULL)
SAG
(LINE VOLTAGE SAG DETECT)
RESERVED = 0
WSMP
(WAVEFORM SAMPLING)
AEHF
(ACTIVE ENERGY REGISTER HALF FULL)
SAG
(LINE VOLTAGE SAG DETECT)
RESERVED = 0
WSMP
(WAVEFORM SAMPLING)
ADE7756