參數(shù)資料
型號： 24707_PUB
英文描述： Programmable Resolution 1-Wire Digital Thermometer
中文描述： 時鐘發(fā)生器規(guī)格的AMD Athlon？ 64和AMD Opteron？處理器
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文件大?。?/td> 1783K
代理商： 24707_PUB
24707 Rev. 3.08 September 2003
Clock Generator Specification for AMD64 Processors
Chapter 8
SMBus Interface
The clock generator features an SMBus 1.0 connection that is designed for use in configuring
internal register settings that control particular device functions and read back the current state of
the control registers. Upon power-up, the clock generator initializes with default settings/board
strappings, therefore the use of the software programming is optional. In order to override the
initial settings, Byte0 bit0 must first be activated to allow for software settings. Once this bit is
set, the other registers can be programmed accordingly. Once a feature is changed, the value
programmed through the SMBus interface will override the initial hardware setting except where
noted. To return to the hardware strapped mode of operation, the software reads the strapped pin
states in Byte 4 and reprograms the device accordingly. Various clock generator manufacturers
may provide additional features as they see fit as long as this basic set of features are included.
8.1
SMBus Protocol
Simplifications to the SMBus 1.1 protocol specification have been made to define a minimum
supported feature set. The feature set is defined in this chapter.
8.1.1
Block Write
The byte/count/byte must be evaluated and compared to the number of received bytes to validate a
block write transfer. A miscompare must leave the register values unchanged. Other methods of
error notification are left to the vendor but none are expressly required.
Note
: The block write compare is only required for server applications.
8.1.2
Block Read
The byte count byte is evaluated by the host controller and errors generated if the compare does
not match the transferred number of bytes. This error can result from
Direct comparison of the byte count to transferred bytes
The protocol error detected from the lack of a NACK condition in the case of an overrun
The protocol error detected from the presence of a NACK condition when an ACK is expected
in the case of an under run
While the SMBus protocol requires host ACK bits to be sent to acknowledge each transferred
bytes, an implementation that ignores these ACK bits as a simplification is acceptable.
Clock generators that implement a simplified block read command, wherein the block read
command is not required and the R/W bit associated with the device address initiates a block read
are allowed in addition to but not as a substitution for the full SMbus block read protocol.
Chapter 8
SMBus Interface
41
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
24-7080-0018 制造商:Kester 功能描述:SN95SB05 #66/44 .025 1 LB SPL Solder Wire
24-7080-0027 制造商:Kester 功能描述:SN95SB05 #66/44 .031 1 LB SPL Solder Wire
24-7080-0060 功能描述:SOLDER FLUX-CORED/44 .062" 1LB S 制造商:kester solder 系列:44 零件狀態(tài):在售 類型:焊線 成分:Sn95Sb5（95/5） 熔點:450 ~ 464°F（232 ~ 240°C） 直徑:0.062"（1.57mm） 焊劑類型:活性松香（RA） 線規(guī):16 AWG，18 SWG 工藝:無鉛 形式:線軸, 1 磅 (454 g) 保質(zhì)期:36 個月（制造日期） 發(fā)貨信息:- 標(biāo)準(zhǔn)包裝:25
24-7080-0061 制造商:Kester 功能描述:SN95SB05 #66/44 .062 1 LB SPL Solder Wire
24-7080-0634 功能描述:SOLDER FLUX-CORED/OR421 .032 1LB 制造商:kester solder 系列:OR421 零件狀態(tài):在售 類型:焊線 成分:Sn95Sb5（95/5） 熔點:450 ~ 464°F（232 ~ 240°C） 直徑:0.032"（0.81mm） 焊劑類型:水溶性 線規(guī):21 AWG，22 SWG 工藝:無鉛 形式:線軸, 1 磅 (454 g) 保質(zhì)期:無保質(zhì)期 發(fā)貨信息:- 標(biāo)準(zhǔn)包裝:25
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