Local and Remote Temperature Registers

I/O

Control

Interface

Pointer Register

Configuration Register

Status Register

Local and Remote Temperature Limit Registers

Conversion Rate Register

Remote Temperature Offset Registers

One-Shot Start Register

Local and Remote THERM Limit Registers

THERM Hysteresis Register

N-factor Correction Register

Consecutive ALERT Register

Digital Filter Register

Manufacturer ID Register

SDA

SCL

TMP451

SBOS686 – JUNE 2013

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REGISTER INFORMATION

The TMP451 contains multiple registers for holding configuration information, temperature measurement results,

and status information. These registers are described in Figure 12 and Table 3.

Pointer Register

Figure 12 shows the internal register structure of the TMP451. The 8-bit pointer register is used to address a

given data register. The pointer register identifies which of the data registers should respond to a read or write

command on the two-wire bus. This register is set with every write command. A write command must be issued

to set the proper value in the pointer register before executing a read command. Table 3 describes the pointer

register and the internal structure of the TMP451 registers. The power-on reset (POR) value of the pointer

register is 00h (0000 0000b).

Figure 12. Internal Register Structure

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