收藏本站
DATA SHEET
8.16 PSMI PROTOCOL
New power management features in computer systems require the system to communicate with the power supply to access
current, voltage, fan speed, and temperature information. Current measurements provide data to the system for determining
potential system configuration limitations and provide actual system power consumption for facility planning. Temperature
and fan monitoring allow the system to better manage fan speeds and temperatures for optimizing system acoustics. Voltage
monitoring allows the system to calculate input wattage and warning of system voltage regulation problems. The Power Sup-
ply Management Interface (PSMI) supports diagnostic capabilities and allows managing of redundant power supplies. The
communication method is SMBus. The current design guideline is version 2.12.
The communication protocol is register based and defines a read and write communication protocol to read / write to a single
register address. All registers are accessed via the same basic command given below. No PEC (Packet Error Code) is used.
WRITE
The write protocol used is the SMBus 2.0 Write Word protocol. All writes are 16-bit words; byte reads are not supported nor
allowed. The shaded areas in the figure indicate bits and bytes written by the PSMI master device. See PFE Programming
Manual for further information.
S Address W A
Register ID
A
Data Low Byte
A
Data High Byte A
P
READ
The read protocol used is the SMBus 2.0 Read Word protocol. All reads are 16-bit words; byte reads are not supported nor
allowed. The shaded areas in the figure indicate bits and bytes written by the PSMI master device. See PFE Programming
Manual for further information.
S Address W A
Register ID
A
S Address R
A
Data Low Byte
A
Data High Byte nA P
8.17 PMBus? PROTOCOL
The Power Management Bus (PMBus?) is an open standard protocol that defines means of communicating with power
conversion and other devices. For more information, please see the System Management Interface Forum web site at :
www.powerSIG.org .
PMBus? command codes are not register addresses. They describe a specific command to be executed. The
PFE1100-12-054xA supply supports the following basic command structures:
? Clock stretching limited to 1 ms
? SCL low time-out of >25 ms with recovery within 10 ms
? Recognized any time Start/Stop bus conditions
WRITE
The write protocol is the SMBus 1.1 Write Byte/Word protocol. Note that the write protocol may end after the command byte
or after the first data byte (Byte command) or then after sending 2 data bytes (Word command).
S Address W A
Command
A
Data Low Byte 1) A
1)
Optional
Data High Byte 1) A
P
In addition, Block write commands are supported with a total maximum length of 255 bytes. See PFE Programming Manual
for further information.
S Address W A
Command
A
Byte Count
A
PFE850-12-054xA
Byte 1
A
16
Byte N
A
P
www.power-one.com
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
PGB1040805NR SUPPRESSOR ESD 24VDC 0805 SMD
PGB2010402KRHF SUPPRESSOR ESD 12VDC 0402 SMD
PHW603616 BOX FIBER 63.5X36.5X18.1" GREY
PI-1902 BOX ABS 1.26" X 1.97" X 3.54"GRY
PI-1905 BOX ABS 1.97" X 2.36" X 4.72"GRY
PI-1908 BOX ABS 2.36" X 3.15" X 5.91"GRY
PI-1911 BOX ABS 3.15" X 3.94" X 7.48"GRY
PJ18168HP42 BOX FIBER 20.0X18.0X8.47" GREY
相关代理商/技术参数
PFE8KR100E 制造商:OHMITE 制造商全称:Ohmite Mfg. Co. 功能描述:Powr-Rib Edgewound Edgewound and Round Wire
PFEC2X2CL 功能描述:FITTING END CAP POLY CLR 2 X 2" RoHS:否 类别:线缆，导线 - 管理 >> 线槽，走线系统 - 附件 系列:- 标准包装:1 系列:PANDUCT® 附件类型:盖 - 线管 适用于相关产品:Panduit 导管 H 型 高度:- 宽:4"（101.6mm） 长度:36.0"（914.4mm） 颜色:黑 其它名称:298-HC4BL36
PFEC4X4CL 功能描述:FITTING END CAP POLY CLR 4 X 4" RoHS:否 类别:线缆，导线 - 管理 >> 线槽，走线系统 - 附件 系列:- 标准包装:1 系列:PANDUCT® 附件类型:盖 - 线管 适用于相关产品:Panduit 导管 H 型 高度:- 宽:4"（101.6mm） 长度:36.0"（914.4mm） 颜色:黑 其它名称:298-HC4BL36
PFEFAN01 制造商:FAIRFORD ELECTRONICS 功能描述:FAN PFE 1
PFEFAN02 制造商:FAIRFORD ELECTRONICS 功能描述:FAN PFE 2
PFEN57-16 制造商:Woodhead Molex 功能描述:
PFE-P 功能描述:线性和开关式电源 COVER FOR PFE RoHS:否 制造商:TDK-Lambda 产品:Switching Supplies 开放式框架/封闭式:Enclosed 输出功率额定值:800 W 输入电压:85 VAC to 265 VAC 输出端数量:1 输出电压（通道 1）:20 V 输出电流（通道 1）:40 A 商用/医用: 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:Rack 长度: 宽度: 高度:
P-FEX-440 制造商:PSM International 功能描述: