Datasheet ADT7311 (Analog Devices) - 10

ADT7311 Data Sheet CS DIN 0x08 0x20 WAIT 240ms MINIMUM FOR CONVERSION TO FINISH DATA DOUT SCLK
26 0 0- 905 0 Figure 12. Typical SPI One-Shot Write to Configuration Register Followed by a Read from the Temperature Value Register
ONE-SHOT MODE 1 SPS MODE
Setting Bit 6 to 0 and Bit 5 to 1 of the configuration register In this mode, the part performs one measurement per second. (Register Address 0x01) enables the one-shot mode. When A conversion takes only 60 ms, and it remains in the idle state this mode is enabled, the ADT7311 immediately completes a for the remaining 940 ms period. This mode is enabled by conversion and then goes into shutdown mode. writing 1 to Bit 6 and 0 to Bit 5 of the configuration register (Register Address 0x01). Wait for a minimum of 240 ms after writing to the operation mode bits before reading back the temperature from the temperature value register. This time ensures that the ADT7311 has time to power up and complete a conversion. To obtain an updated temperature conversion, reset the Bit 6 to 0 and Bit 5 to 1 in the configuration register (0x01). The one-shot mode is useful when one of the circuit design priorities is to reduce power consumption. Rev. 0 | Page 10 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION PRODUCT HIGHLIGHTS FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS SPI TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER DETAILS TEMPERATURE MEASUREMENT ONE-SHOT MODE 1 SPS MODE CT and INT Operation in One-Shot Mode SHUTDOWN FAULT QUEUE TEMPERATURE DATA FORMAT TEMPERATURE CONVERSION FORMULAS 16-Bit Temperature Data Format 13-Bit Temperature Data Format 10-Bit Temperature Data Format 9-Bit Temperature Data Format REGISTERS STATUS REGISTER CONFIGURATION REGISTER TEMPERATURE VALUE REGISTER ID REGISTER TCRIT SETPOINT REGISTER THYST SETPOINT REGISTER THIGH SETPOINT REGISTER TLOW SETPOINT REGISTER SERIAL PERIPHERAL INTERFACE SPI COMMAND BYTE WRITING DATA READING DATA INTERFACING TO DSPs OR MICROCONTROLLERS SERIAL INTERFACE RESET INT AND CT OUTPUTS UNDERTEMPERATURE AND OVERTEMPERATURE DETECTION Comparator Mode Interrupt Mode APPLICATIONS INFORMATION THERMAL RESPONSE TIME SUPPLY DECOUPLING POWERING FROM A SWITCHING REGULATOR TEMPERATURE MONITORING QUICK GUIDE TO MEASURING TEMPERATURE OUTLINE DIMENSIONS ORDERING GUIDE AUTOMOTIVE PRODUCTS