TMP411CD datasheet(32/61 Pages) TI2

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8.1 Register Information

The TMP411/TMP411D contains multiple registers for holding configuration information, temperature

measurement results, maximum and minimum temperature comparator limits, and status information. These

registers are described in Figure 8-1 and Table 8-1.

8.2 Pointer Register

Figure 8-1 shows the internal register structure of the TMP411/TMP411D. The 8-bit pointer register addresses a

given data register. The Pointer Register identifies which of the data registers must 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 8-1 lists the pointer

address of the registers available in the TMP411/TMP411D. Offset registers 11 and 12 are only available for the

TMP411E/TMP411DE device . The power-on-reset (POR) value of the Pointer Register is 00h (0000 0000b).

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

Figure 8-1. Internal Register Structure

8.3 Temperature Registers

The TMP411/TMP411D has four 8-bit registers that hold temperature measurement results. The local and

remote channels have a high byte register that contains the most significant bits (MSBs) of the temperature

analog-to-digital converter (ADC) result and a low byte register that contains the least significant bits (LSBs) of

the temperature ADC result. The local channel high byte address is 00h; the local channel low byte address

is 15h. The remote channel high byte is at address 01h; the remote channel low byte address is 10h. These

registers are read-only and are updated by the ADC each time a temperature measurement is completed.

The TMP411/TMP411D contains circuitry to verify that a low byte register read command returns data from the

same ADC conversion as the immediately preceding high byte read command. This verification remains valid

only until another register is read. For proper operation, the high byte of a temperature register must be read

first. The low byte register must be read in the next read command. The low byte register can be left unread

if the LSBs are not needed. The temperature registers can be read as a 16-bit register using a single two-byte

TMP411, TMP411D

SBOS383E – DECEMBER 2006 – REVISED JULY 2025

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TMP411CD Datasheet(PDF) 32 Page - Texas Instruments

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