ade7854 Analog Devices, Inc., ade7854 Datasheet - Page 68

• Manufacturer Part Number: ade7854
• Description: Poly Phase Multifunction Energy Metering Ic With Neutral Current Measurement
• Manufacturer: Analog Devices, Inc.

ADE7854
Bit
Location
6
7
Table 41. HSDC_CFG register (address 0xE706)
Bit Location
0
1
2
4,3
5
7,6
Table 42. CONFIG2 register (address 0xEC01)
Bit
Location
0
1
7-2
Bit
Mnemonic
EXTREFEN
I2C_LOCK
Reserved
Bit
Mnemonic
RSTREAD
Reserved
Bit Mnemonic
HCLK
HSIZE
HGAP
HXFER[1:0]
HSAPOL
Reserved
Default
value
0
0
00000
Default
value
1
0
Default value
0
0
0
00
0
00
Description
When this bit is 0, signifies the internal voltage reference is used in the ADCs. When this bit is 1, an
external reference is connected to the pin 17 REF in/out
When this bit is 0, the
serial port, this bit must be set to 1 to lock it in. From this moment on, spurious togglings of
the
port, any write to CONFIG2[7:0] register locks the port. From this moment on, a switch into using I
port is no longer possible.
Once locked, the serial port choice is maintained when the ADE7854 changes between PSM0 and
PSM3 power modes.
These bits do not manage any functionality.
Description
-1: phase C is selected for zero crossings counts in the line cycle accumulation mode.
-0: Read-with-reset of all energy registers is disabled. This bit should be cleared to 0 when bits 2,1,0
(LWATT, LVAR, LVA) are set to 1.
-1: Read-with-reset of all xWATTHR, xVARHR, xVAHR registers (x=A,B,C) is enabled. This means a
read of those registers resets them to 0.
This bit does not manage any functionality.
SS
pin and an eventual switch into using SPI port is no longer possible. If SPI is the active serial
-0: HSCLK is 8MHz
-1: HSCLK is 4MHz
-0: HSDC transmits the 32bit registers in 32bit packages, most significant bit first.
-1: HSDC transmits the 32bit registers in 8bit packages, most significant bit first.
-0: no gap is introduced between packages.
-1: a gap of 7 HCLK cycles is introduced between packages.
-00=HSDC transmits all 16 registers shown in Billable registers List
-01= HSDC transmits 7 instantaneous values of currents and voltages
-10= HSDC transmits 9 instantaneous values of phase powers
-11=reserved. If set, the ADE7854 behaves as if HXFER[1:0]=00.
-0: HSACTIVE output pin is active LOW.
-1: HSACTIVE output pin is active HIGH
These bits do not manage any functionality.
Description
Rev. PrC| Page 68 of 71
SS
/HSA pin can be toggled 3 times to activate the SPI port. If I
Preliminary Technical Data
2
C is the active
2
C