One-ShotStartRegister

ConfigurationRegisters

StatusRegister

IdentificationRegisters

N-FactorCorrectionRegisters

ConversionRateRegister

LocalandRemoteTemperatureRegisters

SDA

SCL

PointerRegister

I/O

Control

Interface

SoftwareReset

TMP422-EP

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SBOS577

– SEPTEMBER 2011

REGISTER INFORMATION

The TMP422 contains multiple registers for holding configuration information, temperature measurement results,

and status information. These registers are described in Figure 12 and Table 4.

POINTER REGISTER

Figure 12 shows the internal register structure of the TMP422. 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 4 describes the pointer

address of the TMP422 registers. The power-on reset (POR) value of the Pointer Register is 00h (0000 0000b).

Figure 12. Internal Register Structure

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© 2011, Texas Instruments Incorporated

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Product Folder Link(s): TMP422-EP