参数资料
型号: ADM1276-3ACPZ-RL
厂商: Analog Devices Inc
文件页数: 26/48页
文件大小: 0K
描述: IC HOT SWAP CTLR PMBUS 20LFCSP
标准包装: 5,000
类型: 热交换控制器
应用: 通用
内部开关:
电流限制: 可调
电源电压: 2.95 V ~ 20 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-WQFN 裸露焊盘,CSP
供应商设备封装: 20-LFCSP-WQ(5x5)
包装: 带卷 (TR)
ADM1276
Data Sheet
S
SLAVE ADDRESS
W
A
COMMAND CODE
A Sr
SLAVE ADDRESS
R
A
DATA BYTE LOW
A
DATA BYTE HIGH
A
P
S
SLAVE ADDRESS
W
A
COMMAND CODE
A Sr
SLAVE ADDRESS
R
A
DATA BYTE LOW
A
DATA BYTE HIGH
A
PEC
A
P
MASTER TO SLAVE
SLAVE TO MASTER
Figure 57. Read Word and Read Word with PEC
S
SLAVE ADDRESS
W
A
COMMAND CODE
A Sr
SLAVE ADDRESS
R
A
BYTE COUNT = N
A
DATA BYTE 1
A
DATA BYTE 2
A
DATA BYTE N
A
P
S
SLAVE ADDRESS
DATA BYTE 1
A
W
A
COMMAND CODE
DATA BYTE 2
A
A Sr
SLAVE ADDRESS
DATA BYTE N
A
R
A
BYTE COUNT = N
PEC
A
P
A
MASTER TO SLAVE
SLAVE TO MASTER
Figure 58. Block Read and Block Read with PEC
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
P
MASTER TO SLAVE
SLAVE TO MASTER
Figure 59. Group Command
ONE OR MORE DATA BYTES
S
DEVICE 1 ADDRESS
W
A
COMMAND CODE 1
A
LOW DATA BYTE
A
HIGH DATA BYTE
A
PEC 1
A
ONE OR MORE DATA BYTES
Sr
DEVICE 2 ADDRESS
W
A
COMMAND CODE 2
A
LOW DATA BYTE
A
HIGH DATA BYTE
A
PEC 2
A
ONE OR MORE DATA BYTES
Sr
DEVICE N ADDRESS
W
A
COMMAND CODE N
A
LOW DATA BYTE
A
HIGH DATA BYTE
A
PEC N
A
P
MASTER TO SLAVE
SLAVE TO MASTER
Figure 60. Group Command with PEC
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 I 2 C protocol point of view, a normal write command
consists of the following:
? I 2 C 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).
? I 2 C stop condition to end the transaction.
Rev. C | Page 26 of 48
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