ADM1276-3ACPZ-RL(Rev0) View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
ADM1276-3ACPZ-RL
(Rev.:Rev0)
(Rev.:Rev0)
Analog Devices
ADM1276-3ACPZ-RL Datasheet PDF : 48 Pages
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ADM1276
S
SLAVE ADDRESS
W A COMMAND CODE
A Sr SLAVE ADDRESS
RA
DATA BYTE LOW
A
DATA BYTE HIGH
AP
S
SLAVE ADDRESS
W A COMMAND CODE
A Sr SLAVE ADDRESS
RA
DATA BYTE LOW
A
DATA BYTE HIGH
A
MASTER TO SLAVE
SLAVE TO MASTER
PEC
AP
Figure 57. Read Word and Read Word with PEC
S
SLAVE ADDRESS
W A COMMAND CODE
A Sr SLAVE ADDRESS
RA
BYTE COUNT = N
A
DATA BYTE 1
A
DATA BYTE 2
A
DATA BYTE N
AP
S
SLAVE ADDRESS
W A COMMAND CODE
A Sr SLAVE ADDRESS
RA
BYTE COUNT = N
A
DATA BYTE 1
A
DATA BYTE 2
A
DATA BYTE N
A
PEC
MASTER TO SLAVE
SLAVE TO MASTER
Figure 58. Block Read and Block Read with PEC
AP
S DEVICE 1 ADDRESS W A COMMAND CODE 1 A
ONE OR MORE DATA BYTES
LOW DATA BYTE
A
HIGH DATA BYTE
Sr DEVICE 2 ADDRESS W A COMMAND CODE 2 A
ONE OR MORE DATA BYTES
LOW DATA BYTE
A
HIGH DATA BYTE
Sr DEVICE N ADDRESS W A COMMAND CODE N A
ONE OR MORE DATA BYTES
LOW DATA BYTE
A
HIGH DATA BYTE
MASTER TO SLAVE
SLAVE TO MASTER
Figure 59. Group Command
A
A
AP
ONE OR MORE DATA BYTES
S DEVICE 1 ADDRESS W A COMMAND CODE 1 A
LOW DATA BYTE
A
HIGH DATA BYTE
A
ONE OR MORE DATA BYTES
Sr DEVICE 2 ADDRESS W A COMMAND CODE 2 A
LOW DATA BYTE
A
HIGH DATA BYTE
A
ONE OR MORE DATA BYTES
Sr DEVICE N ADDRESS W A COMMAND CODE N A
LOW DATA BYTE
A
HIGH DATA BYTE
A
MASTER TO SLAVE
SLAVE TO MASTER
Figure 60. Group Command with PEC
PEC 1
PEC 2
PEC N
A
A
AP
GROUP COMMANDS
The PMBus standard defines what are known as group
commands. Group commands are single bus transactions that
send commands or data to more than one device at the same
time. Each device is addressed separately, using its own address;
there is no special group command address. A group command
transaction can contain only write commands that send data to
a device. It is not possible to use a group command to read data
from devices.
From an I2C protocol point of view, a normal write command
consists of the following:
• I2C start condition.
• Slave address bits and a write bit (followed by an
acknowledge from the slave device).
• One or more data bytes (each of which is followed by an
acknowledge from the slave device).
• I2C stop condition to end the transaction.
Rev. 0 | Page 26 of 48
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