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TMP411-Q1 Datasheet(PDF) 20 Page - Texas Instruments |
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TMP411-Q1 Datasheet(HTML) 20 Page - Texas Instruments |
20 / 40 page ![]() TMP411-Q1 SBOS527F – DECEMBER 2010 – REVISED NOVEMBER 2013 www.ti.com SOFTWARE RESET CONSECUTIVE ALERT REGISTER The TMP411-Q1 may be reset by writing any value to The value in the Consecutive Alert Register (address Pointer Register FCh. This restores the power-on- 22h) determines how many consecutive out-of-limit reset state to all of the TMP411-Q1 registers as well measurements must occur on a measurement as aborting any conversion in process and clearing channel before the ALERT signal is activated. The the ALERT and THERM pins. value in this register does not affect bits in the Status Register. Values of one, two, three, or four The TMP411-Q1 also supports reset via the two-wire consecutive conversions can be selected; one general call address (00000000). The TMP411-Q1 conversion is the default. This function allows acknowledges the general call address and responds additional filtering for the ALERT pin. The consecutive to the second byte. If the second byte is 00000110, alert bits are shown in Table 10. the TMP411-Q1 executes a software reset. The TMP411-Q1 takes no action in response to other values in the second byte. Table 10. Consecutive Alert Register CONSECUTIVE ALERT REGISTER (READ = 22h, WRITE = 22h, POR = 01h) NUMBER OF CONSECUTIVE OUT-OF-LIMIT C2 C1 C0 MEASUREMENTS 0 0 0 1 0 0 1 2 0 1 1 3 1 1 1 4 NOTE Bit 7 of the Consecutive Alert Register controls the enable/disable of the timeout function. See the Timeout Function section for a description of this feature. THERM HYSTERESIS REGISTER The THERM Hysteresis Register, shown in Table 12, stores the hysteresis value used for the THERM pin alarm function. This register must be programmed with a value that is less than the Local Temperature High Limit Register value, Remote Temperature High Limit Register value, Local THERM Limit Register value, or Remote THERM Limit Register value; otherwise, the respective temperature comparator does not trip on the measured temperature falling edges. Allowable hysteresis values are shown in Table 11. The default hysteresis value is 10°C, whether the device is operating in the standard or extended mode setting. Table 11. Allowable THERM Hysteresis Val THERM HYSTERESIS VALUE TEMPERATURE TH[11:4] (°C) (HEX) (STANDARD BINARY) 0 0000 0000 00 1 0000 0001 01 5 0000 0101 05 10 0000 1010 0A 25 0001 1001 19 50 0011 0010 32 75 0100 1011 4B 100 0110 0100 64 125 0111 1101 7D 127 0111 1111 7F 150 1001 0110 96 175 1010 1111 AF 200 1100 1000 C8 225 1110 0001 E1 20 Submit Documentation Feedback Copyright © 2010–2013, Texas Instruments Incorporated Product Folder Links: TMP411-Q1 |
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