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ADT7486AARMZ-RL Datasheet(PDF) 7 Page - ON Semiconductor |
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ADT7486AARMZ-RL Datasheet(HTML) 7 Page - ON Semiconductor |
7 / 14 page ADT7484A/ADT7486A http://onsemi.com 7 Product Description The ADT7484A is a single remote temperature sensor, and the ADT7486A is a dual temperature sensor for use in PC applications. The ADT7484A/ADT7486A accurately measure local and remote temperature and communicate over a one-wire Simple Serial Transport (SST) bus interface. SST Interface Simple Serial Transport (SST) is a one-wire serial bus and a communications protocol between components intended for use in personal computers, personal handheld devices, or other industrial sensor nets. The ADT7484A/ADT7486A support SST specification Rev 1. SST is a licensable bus technology from Analog Devices, Inc., and Intel Corporation. To inquire about obtaining a copy of the Simple Serial Transport Specification or an SST technology license, please email Analog Devices, at sst_licensing@analog.com or write to Analog Devices, 3550 North First Street, San Jose, CA 95134, Attention: SST Licensing, M/S B7-24. ADT7484A/ADT7486A Client Address The client address for the ADT7484A/ADT7486A is selected using the address pin. The address pin is connected to a float detection circuit, which allows the ADT7484A/ ADT7486A to distinguish between three input states: high, low (GND), and floating. The address range for fixed address, discoverable devices is 0x48 to 0x50. Table 1. ADT7484A/ADT7486A Selectable Addresses ADD1 ADD0 Address Selected Low (GND) Low (GND) 0x48 Low (GND) Float 0x49 Low (GND) High 0x4A Float Low (GND) 0x4B Float Float 0x4C Float High 0x4D High Low (GND) 0x4E High Float 0x4F High High 0x50 Command Summary Table 7 summarizes the commands supported by the ADT7484A/ADT7486A devices when directed at the target address selected by the fixed address pins. It contains the command name, command code (CC), write data length (WL), read data length (RL), and a brief description. Table 2. Command Code Summary Command Command Code, CC Write Length, WL Read Length, RL Description Ping() 0x00 0x00 0x00 Shows a nonzero FCS over the header if present. GetIntTemp() 0x00 0x01 0x02 Shows the temperature of the device’s internal thermal diode. GetExt1Temp() 0x01 0x01 0x02 Shows the temperature of External Thermal Diode 1. GetExt2Temp() 0x02 0x01 0x02 Shows the temperature of External Thermal Diode 2 (ADT7486A only). GetAllTemps() 0x00 0x01 0x04 (ADT7484A) 0x06 (ADT7486A) Shows a 4- or 6-byte block of data (ADT7484A: GetIntTemp, GetExt1Temp; ADT7486A: GetIntTemp, GetExt1Temp, GetExt2Temp). SetExt1Offset() 0xe0 0x03 0x00 Sets the offset used to correct errors in External Diode 1. GetExt1Offset() 0xe0 0x01 0x02 Shows the offset that the device is using to correct errors in External Diode 1. SetExt2Offset() 0xe1 0x03 0x00 Sets the offset used to correct errors in External Diode 2 (ADT7486A only). GetExt2Offset() 0xe1 0x01 0x02 Shows the offset that the device is using to correct errors in External Diode 2 (ADT7486A only). ResetDevice() 0xf6 0x01 0x00 Functional reset. The ADT7484A/ADT7486A also re- spond to this command when directed to the Target Ad- dress 0x00. GetDIB() 0xf7 0xf7 0x01 0x01 0x08 0x10 Shows information used by SW to identify the device’s capabilities. Can be in 8- or 16-byte format. |
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