ADE7854AACPZ View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'ADE7854AACPZ' PDF : 96 Pages View PDF
ADE7854A/ADE7858A/ADE7868A/ADE7878A
Data Sheet
Table 11. Power Modes and Related Characteristics
Power Mode
LPOILVL and
CONFIG2 Registers
All Other Registers1
PSM0
After Hardware Reset Set to default values Set to default values
After Software Reset Unchanged
Set to default values
PSM1 (ADE7868A and
ADE7878A Only)
Values set during PSM0 Not available
mode are unchanged
PSM2 (ADE7868A and
ADE7878A Only)
Values set during PSM0 Not available
mode are unchanged
PSM3
Values set during PSM0 Not available
mode are unchanged
1 Setting for all registers except the LPOILVL and CONFIG2 registers.
I2C/SPI Port
I2C port enabled
If the lock-in procedure was
previously executed, the active
serial port is unchanged
I2C or SPI port enabled, but
with limited functionality
Serial port disabled
Serial port disabled
Functionality
All circuits are active and DSP is in
idle mode
All circuits are active and DSP is in
idle mode
Current mean absolute values are
computed, and the results are stored
in the AIMAV, BIMAV, and CIMAV
registers
Compares phase currents against the
threshold set in the LPOILVL register
and triggers the IRQ0 or IRQ1 pin
accordingly
Internal circuits are shut down
Table 12. Recommended Actions When Changing Power Modes
Initial
Power Mode
Recommended Actions
Before Setting Next
Power Mode
PSM0
PSM0
Stop the DSP by setting
the run register to
0x0000.
Disable HSDC by clearing
Bit 6 (HSDCEN) to 0 in the
CONFIG register.
Mask interrupts by setting
MASK0 and MASK1
registers to 0x0.
Erase interrupt status
flags in the STATUS0 and
STATUS1 registers.
PSM1
(ADE7868A and
ADE7878A Only)
No action necessary.
Wait until the IRQ1 pin is
pulled low.
Poll the STATUS1 register
until Bit 15 (RSTDONE) is
set to 1.
PSM2
(ADE7868A and
ADE7878A Only)
No action necessary.
Wait until the IRQ1 pin is
pulled low.
Poll the STATUS1 register
until Bit 15 (RSTDONE) is
set to 1.
PSM3
No action necessary.
Wait until the IRQ1 pin is
pulled low.
Poll the STATUS1 register
until Bit 15 (RSTDONE) is
set to 1.
Next Power Mode
PSM1
Current mean absolute values
(MAV) computed immediately.
xIMAV registers immediately
accessible.
Wait until the IRQ1 pin is
pulled low.
Current mean absolute values
computed after IRQ1 pin is
pulled low.
xIMAV registers accessible
after IRQ1 pin is pulled low.
Wait until the IRQ1 pin is
pulled low.
Current mean absolute values
computed after IRQ1 pin is
pulled low.
xIMAV registers accessible
after IRQ1 pin is pulled low.
PSM2
Wait until the IRQ0
or IRQ1 pin is pulled
low.
Wait until the IRQ0
or IRQ1 pin is pulled
low.
Wait until the IRQ0
or IRQ1 pin is pulled
low.
PSM3
No action
necessary.
No action
necessary.
No action
necessary.
Rev. C | Page 24 of 96
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