ADE7754ARRL Analog Devices Inc, ADE7754ARRL Datasheet - Page 31

• Manufacturer Part Number: ADE7754ARRL
• Description: IC ENERGY METERING 24-SOIC TR
• Manufacturer: Analog Devices Inc

Specifications of ADE7754ARRL

• Rohs Status: RoHS non-compliant
• Input Impedance: 370 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 2.4V
• Voltage - I/o Low: 0.8V
• Current - Supply: 7mA
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (0.300", 7.50mm Width)
• Meter Type: 3 Phase
• For Use With: EVAL-ADE7754EBZ - BOARD EVALAUTION FOR ADE7754

ACCESSING THE ADE7754 ON-CHIP REGISTERS
All ADE7754 functionality is accessed via the on-chip registers.
Each register is accessed by first writing to the communications
register, then transferring the register data. For a full description
of the serial interface protocol, see the Serial Interface section.
Bit
Location
0 to 5
6
7
REV. 0
Bit
Mnemonic
A0 to A5
RESERVED
W/R
This bit is unused and should be set to 0.
Description
The six LSBs of the communications register specify the register for the data transfer operation.
Table VIII lists the address of each ADE7754 on-chip register.
When this bit is a Logic 1, the data transfer operation immediately following the write to the com-
munications register will be interpreted as a write to the ADE7754. When this bit is a Logic 0, the
data transfer operation immediately following the write to the communications register will be
interpreted as a read operation.
DB7
W/R
DB6
Table VII. Communications Register
0
DB5
A5
DB4
A4
–31–
DB3
Communications Register
The communications register is an 8-bit, write-only register that
controls the serial data transfer between the ADE7754 and the
host processor. All data transfer operations must begin with a
write to the communications register. The data written to the
communications register determines whether the next operation
is a read or a write and which register is being accessed. Table VII
outlines the bit designations for the communications register.
A3
DB2
A2
DB1
A1
DB0
A0
ADE7754