ADE7754_15 datasheet(31/44 Pages) AD

31 / 44 page

REV. 0

ADE7754

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Table VII. Communications Register

Bit

Location

Mnemonic

Description

0 to 5

A0 to A5

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.

RESERVED

This bit is unused and should be set to 0.

7W/

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

DB6

DB5

DB4

DB3

DB2

DB1

DB0

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

of the serial interface protocol, see the Serial Interface section.

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.

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