參數(shù)資料
型號(hào)： ADE7878ACPZ-RL
廠商： ANALOG DEVICES INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： Poly Phase Multifunction Energy Metering IC With Total And Fundamental Powers, No Of Pins: 40, Temperature Range: Ind
中文描述： SPECIALTY ANALOG CIRCUIT, QCC40
封裝： 6 X 6 MM, ROHS COMPLIANT, MO-220WJJD, LFCSP-40
文件頁(yè)數(shù)： 63/96頁(yè)
文件大?。?/td> 1096K
代理商： ADE7878ACPZ-RL
ADE7854/ADE7858/ADE7868/ADE7878
Rev. E | Page 66 of 96
I2C Write Operation
The write operation using the I2C interface of the ADE7854/
ADE7858/ADE7868/ADE7878 initiate when the master generates
a start condition and consists in one byte representing the
address of the ADE78xx followed by the 16-bit address of the
target register and by the value of the register.
The most significant seven bits of the address byte constitute
the address of the ADE7854/ADE7858/ADE7868/ADE7878
and they are equal to 0111000b. Bit 0 of the address byte is a
read/write bit. Because this is a write operation, it has to be
cleared to 0; therefore, the first byte of the write operation is
0x70. After every byte is received, the ADE7854/ADE7858/
ADE7868/ADE7878 generate an acknowledge. As registers can
have 8, 16, or 32 bits, after the last bit of the register is transmitted
and the ADE78xx acknowledges the transfer, the master gene-
rates a stop condition. The addresses and the register content
are sent with the most significant bit first. See
for
details of the I2C write operation.
ACKNOWLEDGE
GENERATED BY
ADE78xx
ST
A
R
T
ST
O
P
S
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
S
0
15
SLAVE ADDRESS
MS 8 BITS OF
REGISTER ADDRESS
LS 8 BITS OF
REGISTER ADDRESS
BYTE 3 (MS)
OF REGISTER
BYTE 2 OF REGISTER
BYTE 1 OF REGISTER
BYTE 0 (LS) OF
REGISTER
87
0
31
16
15
8
7
0
7
111000 0
08
51
0-
05
9
Figure 81. I2C Write Operation of a 32-Bit Register
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