ade7880 Analog Devices, Inc., ade7880 Datasheet - Page 101

• Manufacturer Part Number: ade7880
• Description: Polyphase Multifunction Energy Metering Ic With Harmonic Monitoring
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
Bit
Location
4:3
7:5
9:8
15:10
Table 52. LPOILVL Register (Address 0xEC00)
Bit Location
2:0
7:3
Table 53. CONFIG2 Register (Address 0xEC01)
Bit
Location
0
1
7:2
Bit Mnemonic
HSTIME
HRATE
ACTPHSEL
Reserved
Bit Mnemonic
EXTREFEN
I2C_LOCK
Reserved
Bit Mnemonic
LPOIL[2:0]
LPLINE[4:0]
Default Value
0
0
0
Default Value
01
000
00
0
Default Value
111
00000
Description
When this bit is 0, it signifies that the internal voltage reference is used in the ADCs.
When this bit is 1, an external reference is connected to the Pin 17 REF
When this bit is 0, the SS /HSA pin can be toggled three times to activate the SPI port. If I
the active serial port, this bit must be set to 1 to lock it in. From this moment on, toggling of
the SS /HSA pin and an eventual switch into using the SPI port is no longer possible. If SPI is the
active serial port, any write to CONFIG2 register locks the port. From this moment on, a
switch into using I
maintained when the ADE7880 changes PSMx power modes.
Reserved. These bits do not manage any functionality.
Description
These bits decide the delay period after which, if HRCFG bit is set to 1, bit 19 (HREADY)
interrupt in MASK0 register is triggered.
00=500msec
01=750msec
10=1000msec
11=1250msec
These bits manage the update rate of the harmonic registers.
000=125µsec (8KHz rate)
001=250 µsec (4KHz rate)
010=1msec (1KHz rate)
011=16msec (62.5Hz rate)
100=128msec (7.8125Hz rate)
101=512msec (1.953125Hz rate)
110=1.024sec (0.9765625Hz rate)
111=harmonic calculations disabled
These bits select the phase voltage used as time base for harmonic calculations.
00=Phase A voltage
01=Phase B voltage
10=Phase C voltage
11=Reserved. If selected, phase C voltage is used.
Reserved. These bits do not manage any functionality.
Description
Threshold is put at a value corresponding to full scale multiplied by LPOIL/8.
The measurement period is (LPLINE + 1)/50 seconds.
Rev. PrE| Page 101 of 103
2
C port is no longer possible. Once locked, the serial port choice is
IN/OUT
.
ADE7880
2
C is