ZHCSHX1E March 2018 – August 2021 TMP1075
PRODUCTION DATA
The configuration register is an 16-bit read/write register used to store bits that control the operational modes of the temperature sensor. Read and write operations are performed MSB first. Figure 9-12 shows the format of the configuration register for the TMP1075, followed by a breakdown of the register bits. The power-up or reset value of the configuration register are all bits equal to 00FFh (TMP1075N: 60A0h). Only single byte writes and reads must be used when pointing to the configuration register for proper operation on the TMP1075N orderable.
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| OS | R1 | R0 | F1 | F0 | POL | TM | SD |
| R/W-0 | R/W-0 | R/W-0 | R/W-0 | R/W-0 | R/W-0 | R/W-0 | R/W-0 |
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| R/W-1 | R/W-1 | R/W-1 | R/W-1 | R/W-1 | R/W-1 | R/W-1 | R/W-1 |
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| OS | R1 | R0 | F1 | F0 | POL | TM | SD |
| R/W-0 | R-1 | R-1 | R/W-0 | R/W-0 | R/W-0 | R/W-0 | R/W-0 |
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 1 | 0 | x | 0 | 0 | 0 | 0 | 0 |
| Reserved | Reserved | Reserved | Reserved | Reserved | Reserved | Reserved | Reserved |
| BIT | FIELD | TYPE | RESET | DESCRIPTION |
|---|---|---|---|---|
| 15 | OS | R/W | 0 | One-shot conversion mode. Writing 1, starts a single temperature conversion. Read returns 0. |
| 14:13 | R[1:0] | R/W R (TMP1075N) |
0 11 (TMP1075N) |
Conversion rate setting when
device is in continuous conversion mode 00: 27.5 ms conversion rate 01: 55 ms conversion rate 10: 110 ms conversion rate 11: 220 ms conversion rate (35 ms TMP1075N) |
| 12:11 | F[1:0] | R/W | 0 | Consecutive fault
measurements to trigger the alert function 00: 1 fault 01: 2 faults 10: 3 faults (4 faults TMP1075N) 11: 4 faults (6 faults TMP1075N) |
| 10 | POL | R/W | 0 | Polarity of the output pin 0: Active low ALERT pin 1: Active high ALERT pin |
| 9 | TM | R/W | 0 | Selects the function of the
ALERT pin 0: ALERT pin functions in comparator mode 1: ALERT pin functions in interrupt mode |
| 8 | SD | R/W | 0 | Sets the device in shutdown
mode to conserve power 0: Device is in continuous conversion 1: Device is in shutdown mode |
| 7:0 | — | R/W | FFh A0h (TMP1075N) |
Not used Reserved on TMP1075N package |
The configuration register supports single-byte read and write over I2C bus to ensure software compatibility with other xx75 standard temperature sensors like TMP75 and LM75. When a single byte write is performed, the data byte on the I2C bus updates the register bits 15-8. Similarly when a single byte read is performed, the data bits 15-8 is transferred over the I2C bus.