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EMC2104-BP-TR 参数 Datasheet PDF下载

EMC2104-BP-TR图片预览
型号: EMC2104-BP-TR
PDF下载: 下载PDF文件 查看货源
内容描述: [Switching Controller]
分类和应用: 风扇控制器
文件页数/大小: 101 页 / 1474 K
品牌: SMSC [ SMSC CORPORATION ]
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Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown  
Datasheet  
when the temperature drops below the high limit. The ALERT# pin will be asserted and released  
normally.  
Bit 3 - SYS3 - Enables the high temperature limit for the External Diode 3 channel to trigger the Critical  
/ Thermal Shutdown circuitry (see Section 6.1).  
Bit 2 - SYS2 - Enables the high temperature limit for the External Diode 2 channel to trigger the Critical  
/ Thermal Shutdown circuitry (see Section 6.1).  
Bit 1 - SYS1 - Enables the high temperature limit for the External Diode 1 channel to trigger the Critical  
/ Thermal Shutdown circuitry (see Section 6.1).  
Bit 0 - APD - This bit enables the Anti-parallel diode functionality on the External Diode 3 pins (DP3  
and DN3).  
„
‘0’ (default) - The Anti-parallel diode functionality is disabled. The External Diode 3 channel can be  
configured for any type of diode  
„
‘1’ - The Anti-parallel diode functionality is enabled. Both the External Diode 3 and 4 channels are  
configured to support a diode or diode connected transistor (such as a 2N3904).  
APPLICATION NOTE: When the APD diode is enabled, there will be a delay of a full temperature update before  
any comparisons and functionality associated with the External Diode 4 channel will be  
implemented. This includes the SYS4 bit operation, limit comparisons, and look up table  
comparisons.  
6.10  
Configuration 2 Register  
Table 6.13 Configuration 2 Register  
ADDR  
21h  
R/W  
REGISTER  
B7  
B6  
B5  
B4  
B3  
B2  
B1  
B0  
DEFAULT  
DIS_  
DYN  
DIS_  
TO  
DIS_  
AVG  
R/W  
Config 2  
-
QUEUE[1:0]  
CONV[1:0]  
0Eh  
The Configuration 2 Register controls conversion rate of the temperature monitoring as well as the  
fault queue. This register is software locked.  
Bit 6 - DIS_DYN - Disables the Dynamic Averaging Feature.  
„
‘0’ (default) - The Dynamic Averaging function is enabled. The conversion time for all temperature  
channels is scaled based on the chosen conversion rate to maximize accuracy and immunity to  
random temperature measurement variation.  
„
‘1’ - The Dynamic Averaging function is disabled. The conversion time for all temperature channels  
is fixed regardless of the chosen conversion rate.  
Bit 5 - DIS_TO - Disables the SMBus time out function for the SMBus client (if enabled).  
„
„
‘0’ (default) - The SMBus time out function is enabled.  
‘1’ - The SMBus time out function is disabled allowing the device to be fully I2C compliant.  
Bit 4 - DIS_AVG - Disables digital averaging of the External Diode 1 channel.  
„
‘0’ (default) - The External Diode 1 channel has digital averaging enabled. The temperature data  
is the average of the previous four measurements.  
„
‘1’ - The External Diode 1 channel has digital averaging disabled. The temperature data is the last  
measured data.  
Bits 3-2 - QUEUE[1:0] - Determines the number of consecutive out of limit conditions that are  
necessary to trigger an interrupt. Each measurement channel has a separate fault queue associated  
with the high limit, low limit, and diode fault condition except the internal diode.  
Revision 1.74 (05-08-08)  
SMSC EMC2104  
DATA5S6HEET