JAJSD83C May 2017 – October 2019 TMP464
PRODUCTION DATA.
The THERM Status register reports the state of the THERM limit comparators for local and four remote temperatures. Table 5 lists the status register bits. The THERM Status register is read-only and is read by accessing pointer address 21h.
THERM STATUS REGISTER (READ = 21h, WRITE = N/A) | ||
---|---|---|
BIT NUMBER | BIT NAME | FUNCTION |
15:12 | 0 | Reserved for future use; always reports 0. |
11 | R4TH | 1 when Remote 4 exceeds the THERM limit |
10 | R3TH | 1 when Remote 3 exceeds the THERM limit |
9 | R2TH | 1 when Remote 2 exceeds the THERM limit |
8 | R1TH | 1 when Remote 1 exceeds the THERM limit |
7 | LTH | 1 when Local sensor exceeds the THERM limit |
6:0 | 0 | Reserved for future use; always reports 0. |
The R4TH:R1TH and LTH flags are set when the corresponding temperature exceeds the respective programmed THERM limit (39h, 42h, 4Ah, 52h, and 5Ah). These flags are reset automatically when the temperature returns below the THERM limit minus the value set in the THERM Hysteresis register (38h). The THERM output goes low in the case of overtemperature on either the local or remote channels, and goes high as soon as the measurements are less than the THERM limit minus the value set in the THERM Hysteresis register. The THERM Hysteresis register (38h) allows hysteresis to be added so that the flag resets and the output goes high when the temperature returns to or goes below the limit value minus the hysteresis value.