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EMC1182-1-AIA-TR 参数 Datasheet PDF下载

EMC1182-1-AIA-TR图片预览
型号: EMC1182-1-AIA-TR
PDF下载: 下载PDF文件 查看货源
内容描述: 双通道1C温度传感器,带有beta补偿和1.8V的SMBus通信 [Dual Channel 1C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications]
分类和应用: 传感器温度传感器通信
文件页数/大小: 48 页 / 565 K
品牌: SMSC [ SMSC CORPORATION ]
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Dual Channel 1°C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications  
Datasheet  
4.1.7  
SMBus Stop Bit  
The SMBus Stop bit is defined as a transition of the SMBus Data line from a logic ‘0’ state to a logic  
‘1’ state while the SMBus clock line is in a logic ‘1’ state. When the device detects an SMBus Stop bit  
and it has been communicating with the SMBus protocol, it will reset its client interface and prepare  
to receive further communications.  
4.1.8  
4.1.9  
SMBus Timeout  
The EMC1182 supports SMBus Timeout. If the clock line is held low for longer than tTIMEOUT, the  
device will reset its SMBus protocol. This function can be enabled by setting the TIMEOUT bit (see  
Section 6.11, "Consecutive ALERT Register 22h").  
2
SMBus and I C Compatibility  
The EMC1182 is compatible with SMBus and I2C. The major differences between SMBus and I2C  
devices are highlighted here. For more information, refer to the SMBus 2.0 and I2C specifications. For  
information on using the EMC1182 in an I2C system, refer to SMSC AN 14.0 SMSC Dedicated Slave  
Devices in I2C Systems.  
1. EMC1182 supports I2C fast mode at 400kHz. This covers the SMBus max time of 100kHz.  
2. Minimum frequency for SMBus communications is 10kHz.  
3. The SMBus client protocol will reset if the clock is held at a logic ‘0’ for longer than 30ms. This  
timeout functionality is disabled by default in the EMC1182 and can be enabled by writing to the  
TIMEOUT bit. I2C does not have a timeout.  
4. I2C devices do not support the Alert Response Address functionality (which is optional for SMBus).  
Attempting to communicate with the EMC1182 SMBus interface with an invalid slave address or invalid  
protocol will result in no response from the device and will not affect its register contents. Stretching  
of the SMCLK signal is supported, provided other devices on the SMBus control the timing.  
4.2  
SMBus Protocols  
The device supports Send Byte, Read Byte, Write Byte, Receive Byte, and the Alert Response Address  
as valid protocols as shown below.  
All of the below protocols use the convention in Table 4.1.  
Table 4.1 Protocol Format  
DATA SENT  
TO DEVICE  
DATA SENT TO  
THE HOST  
# of bits sent  
# of bits sent  
SMSC EMC1182  
15  
Revision 1.0 (07-11-13)  
DATASHEET