TMP451
SBOS686 –JUNE 2013
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ALERT and THERM Functions
The operation of the ALERT (pin 6) and THERM (pin 4) interrupts is shown in Figure 13. The operation of the
THERM (pin 4) and THERM2 (pin 6) interrupts is shown in Figure 14.
100
90
80
70
THERM Limit
THERM Limit - Hysteresis
60
50
High Temperature Limit
40
30
20
10
0
ALERT
THERM
Figure 13. ALERT and THERM Interrupt Operation
100
90
80
70
THERM Limit
THERM2 Limit
60
50
40
30
20
10
0
THERM2
THERM
Figure 14. THERM and THERM2 Interrupt Operation
The hysteresis value can be stored in the THERM hysteresis register.
General Call Reset
The TMP451 supports reset using the two-wire General Call address 00h (0000 0000b). The TMP451
acknowledges the General Call address and responds to the second byte. If the second byte is 06h (0000
0110b), the TMP451 execute a software reset. This software reset restores the power-on reset state to all
TMP451 registers, and it aborts any conversion in progress. The TMP451 takes no action in response to other
values in the second byte.
Identification Register
The TMP451 allows for the two-wire bus controller to query the device for manufacturer and device IDs to enable
software identification of the device at the particular two-wire bus address. The manufacturer ID is obtained by
reading from pointer address FEh. The TMP451 reads 55h for the manufacturer code.
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