Electronic Components Datasheet Search |
|
ADT7488A Datasheet(PDF) 8 Page - ON Semiconductor |
|
ADT7488A Datasheet(HTML) 8 Page - ON Semiconductor |
8 / 12 page ADT7488A http://onsemi.com 8 Table 3. 16−Byte DIB Details Byte Name Value Description 0 Device Capabilities 0xc0 Fixed address device 1 Version/Revision 0x10 Meets Version 1 of SST specification 2, 3 Vendor ID 00x11d4 Contains company ID number in little endian format 4, 5 Device ID 0x7488 Contains device ID number in little endian format 6 Device Interface 0x01 SST device 7 Function Interface 0x00 Reserved 8 Reserved 0x00 Reserved 9 Reserved 0x00 Reserved 10 Reserved 0x00 Reserved 11 Reserved 0x00 Reserved 12 Reserved 0x00 Reserved 13 Reserved 0x00 Reserved 14 Revision ID 0x05 Contains revision ID 15 Client Device Address 0x48 to 0x4a Dependent on the state of address pin Ping() The Ping() command verifies if a device is responding at a particular address. The ADT7488A shows a valid non−zero FCS in response to the Ping() command when correctly addressed. Table 4. Ping() Command Target Address Write Length Read Length FCS (Not necessary) 0x00 0x00 ResetDevice() This command resets the register map and conversion controller. The reset command can be global or directed at the client address of the ADT7488A. Table 5. ResetDevice() Command Target Address Write Length Read Length Reset Command FCS Device Address 0x01 0x00 0xf6 GetIntTemp() The ADT7488A shows the local temperature of the device in response to the GetIntTemp() command. The data has a little endian, 16−bit, twos complement format. GetExt1Temp() Prompted by the GetExt1Temp() command, the ADT7488A shows the temperature of Remote Diode 1 in little endian, 16−bit, twos complement format. The ADT7488A shows 0x8000 in response to this command if the external diode is an open or short circuit. GetExt2Temp() Prompted by the GetExt2Temp() command, ADT7488A shows the temperature of Remote Diode 2 in little endian, 16−bit, twos complement format. The ADT7488A shows 0x8000 in response to this command if the external diode is an open or short circuit. GetAllTemps() The ADT7488A shows the local and remote temperatures in a 6−byte block of data (internal temperature first, followed by External 1 temperature, followed by External 2 temperature) in response to a GetAllTemps() command. SetExtOffset() This command sets the offset that the ADT7488A will use to correct errors in the external diode. The offset is set in little endian, 16−bit, twos complement format. The maximum offset is ±128°C with +0.25°C resolution. GetExtOffset() This command causes the ADT7488A to show the offset that it is using to correct errors in the external diode. The offset value is returned in little endian format, that is, LSB before MSB. ADT7488A Response to Unsupported Commands A full list of command codes supported by the ADT7488A is given in Table 2. The offset registers (Command Code 0xe0) are the only registers that the user can write to. The other defined registers are read only. Writing to Register Addresses 0x02, 0x09, and 0x15 to 0xdf shows a valid FSC, but no action is taken by the ADT7488A. The ADT7488A shows an invalid FSC if the user attempts to write to the device between Command Codes 0xe2 to 0xee. These registers are reserved for the manufacturer’s use only, and no data can be written to the device via these addresses. Voltage Measurement The ADT7488A has two external voltage measurement channels. It can also measure its own supply voltage, VCC. Pins 7 and 8 measure the supplies of the processor core voltage (VCCP), and 2.5 V pins, respectively. The VCC supply voltage measurement is carried out through the VCC pin (Pin 1). The 2.5 V pin can be used to monitor a chip−set supply voltage in a computer system. Analog−to−Digital Converter All analog inputs are multiplexed into the on−chip, successive approximation, analog−to−digital converter (ADC). This has a resolution of 10 bits. The basic input range is 0 V to 2.25 V, but the inputs have built−in attenuators to allow measurement of 2.5 V, 3.3 V, 5.0 V, 12 V, and the processor core voltage (VCCP) without any external components. To allow for the tolerance of these supply voltages, the ADC produces a specific output for each nominal input |
Similar Part No. - ADT7488A |
|
Similar Description - ADT7488A |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |