參數(shù)資料
型號： TOOLSTICK300DC
廠商： Silicon Laboratories Inc
文件頁數(shù)： 20/178頁
文件大?。?/td> 0K
描述： TOOLSTICK DAUGHTER CARD
標準包裝： 1
系列： ToolStick
類型： MCU
適用于相關產品： C8051F300
所含物品： 子卡
C8051F300/1/2/3/4/5
116
Rev. 2.9
13.4.1. SMBus Configuration Register
The SMBus Configuration register (SMB0CF) is used to enable the SMBus Master and/or Slave modes,
select the SMBus clock source, and select the SMBus timing and timeout options. When the ENSMB bit is
set, the SMBus is enabled for all master and slave events. Slave events may be disabled by setting the
INH bit. With slave events inhibited, the SMBus interface will still monitor the SCL and SDA pins; however,
the interface will NACK all received addresses and will not generate any slave interrupts. When the INH bit
is set, all slave events will be inhibited following the next START (interrupts will continue for the duration of
the current transfer).
Table 13.1. SMBus Clock Source Selection
SMBCS1
SMBCS0
SMBus Clock Source
0
Timer 0 Overflow
0
1
Timer 1 Overflow
1
0
Timer 2 High Byte Overflow
1
Timer 2 Low Byte Overflow
The SMBCS1-0 bits select the SMBus clock source, which is used only when operating as a master or
when the Free Timeout detection is enabled. When operating as a master, overflows from the selected
source determine the absolute minimum SCL low and high times as defined in Equation 13.1. Note that the
selected clock source may be shared by other peripherals so long as the timer is left running at all times.
For example, Timer 1 overflows may generate the SMBus and UART baud rates simultaneously. Timer
configuration is covered in Section “15. Timers” on page 143.
T
HighMin
T
LowMin
1
f
ClockSourceOverflow
----------------------------------------------
==
Equation 13.1. Minimum SCL High and Low Times
The selected clock source should be configured to establish the minimum SCL High and Low times as per
Equation 13.1. When the interface is operating as a master (and SCL is not driven or extended by any
other devices on the bus), the typical SMBus bit rate is approximated by Equation 13.2.
BitRate
f
ClockSourceOverflow
3
----------------------------------------------
=
Equation 13.2. Typical SMBus Bit Rate
Figure 13.4 shows the typical SCL generation described by Equation 13.2. Notice that THIGH is typically
twice as large as TLOW. The actual SCL output may vary due to other devices on the bus (SCL may be
extended low by slower slave devices, or driven low by contending master devices). The bit rate when
operating as a master will never exceed the limits defined by equation Equation 13.1.
相關PDF資料
PDF描述
TOOLSTICK411DC TOOLSTICK DAUGHTER CARD
TOOLSTICK336DC DAUGHTER CARD TOOLSTICK C8051F33
SDR-2 SCOTCH CODE REFILL # 2
0210490198 CABLE JUMPER 1.25MM .127M 14POS
RSM08DRTH CONN EDGECARD 16POS DIP .156 SLD
相關代理商/技術參數(shù)
參數(shù)描述
TOOLSTICK300PP 功能描述:插座和適配器 Dev Tool for C8051F30X MCUs RoHS:否 制造商:Silicon Labs 產品:Adapter 用于:EM35x
TOOLSTICK300SPP 功能描述:插座和適配器 TS for F300-F305 SOIC 14 MCUs RoHS:否 制造商:Silicon Labs 產品:Adapter 用于:EM35x
TOOLSTICK310PP 功能描述:插座和適配器 C8051F310/12/14 F361 F364 F366 F368 RoHS:否 制造商:Silicon Labs 產品:Adapter 用于:EM35x
TOOLSTICK311DC 功能描述:子卡和OEM板 ToolStick C8051F311 Daughter Card RoHS:否 制造商:BeagleBoard by CircuitCo 產品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
TOOLSTICK311PP 功能描述:插座和適配器 C8051F311/13/15 F362 F365 F367 F369 RoHS:否 制造商:Silicon Labs 產品:Adapter 用于:EM35x
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*