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參數(shù)資料
| 型號(hào)： | W83791D |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類(lèi)： | 模擬信號(hào)調(diào)理 |
| 英文描述： | W83791D Winbond H/W Monitoring IC |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PQFP48 |
| 封裝： | LQFP-48 |
| 文件頁(yè)數(shù)： | 21/46頁(yè) |
| 文件大小： | 636K |
| 代理商： | W83791D |
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W83791D
Preliminary
Publication Release Date: Aug, 2001
Revision 0.41
14
6.4
Address Resolution Protocol (ARP) Introduction
As the W8791D is a slave device existing on the System Management Bus, it must have a unique address to
prevent itself from conflicting with the other devices existing on the same bus. In order to solve the problem of
address conflicts, SMBus version 2.0 introduces the concept of dynamically assigned address called Address
Resolution Protocol (ARP). By such mechanism, each device existing on the SMBus will be given an unique slave
address if it is a ARP-capable device. Thus, to meet the new spec, W83791D uniquely provides ARP compliant
function to acquire an unique slave address.
The typical process of ARP contains several steps, including Prepare to ARP, Reset Device, Get UDID,
Assign Address, and so on. Whenever the slave device accepts the command of ARP master, it must reply an
Acknowledgement to the ARP master, thus the ARP master is able to carry on the next step. In order to provide a
mechanism to isolate device for the purpose of address assignment, each device must implement a unique device
identifier (UDID). The UDID is a 128-bit number comprised of several field, including Device Capabilities, Version
Revision, Vendor ID, Device ID, Interface, Subsystem Vendor ID, Subsystem Device ID, and Vendor Specific ID.
After the UDID of the device is sent to the ARP master, the ARP master will then assign a random address not in the
Used Address Pool to the device
Generally speaking, there are eleven possible commands to read /write the data of SMBus device, and a slave
device may use any or all of the eleven protocols to communicate. These protocols are Quick Command, Send Byte,
Receive Byte, Write Byte, Write Word, Read Byte, Read word, Process Call, Block Write, and Block Write-Block
Read Process Call. W83791D itself supports the Block Write-Block Read Process with PEC to communicate with
ARP Master. Following is a description of the SMBus packet protocol diagrams element key.. Not all protocol
elements will be present in every command, that is, not all packets are required to include the Packet Error Code.
1-bit
7
1
1
8
S
Slave Address
Wr A
Command
1
A
8
PEC
1
A
1-bit
P
S
Start Condition
Sr
Rd
Repeated Start Condition
Read (bit value of 1)
Wr
A
Write (bit value of 0)
Acknowledge (this bit position may be ‘0’ for an
ACK or ‘1’ for a NACK)
P
PEC
Stop Condition
Packet Error Code
Master-to-Slave
Slave-to-Master
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| W83791G | 功能描述:IC MONITOR H/W 48-LQFP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類(lèi)型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠(yuǎn)程（最大值） 拓?fù)?ADC，比較器，寄存器庫(kù) 輸出類(lèi)型:2 線 SMBus? 輸出警報(bào):無(wú) 輸出風(fēng)扇:無(wú) 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類(lèi)型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱(chēng):296-22675-6 |
| W83791SD | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:H/W MONITORING IC |
| W83791SG | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:H/W MONITORING IC |
| W83792AD | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:H/W Monitoring IC (CSB Version) |
| W83792AG | 功能描述:IC MONITOR H/W 48-LQFP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類(lèi)型:內(nèi)部和外部 感應(yīng)溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠(yuǎn)程（最大） 拓?fù)?ADC（三角積分型），比較器，寄存器庫(kù) 輸出類(lèi)型:I²C?/SMBus? 輸出警報(bào):是 輸出風(fēng)扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱(chēng):MIC284-2BMMTRMIC284-2BMMTR-ND |
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