TMP468AIYFFR datasheet(22/49 Pages) TI2

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Pointer Register

Serial

Interface

Local Temp

Remote Temp 1

Remote Temp 3

Remote Temp 4

Remote Temp 2

Remote Temp 5

Remote Temp 7

Remote Temp 8

Remote Temp 6

Configuration

Lock Initialization

Remote 1 Offset

Remote 1 K -factor

Remote 1 THERM

Remote 1 THERM2

Remote 2 Offset

Remote 2 K -factor

Remote 2 THERM

Remote 2 THERM2

Remote 3 Offset

Remote 3 K -factor

Remote 3 THERM

Remote 3 THERM2

Remote 4 Offset

Remote 4 K -factor

Remote 4 THERM

Remote 4 THERM2

Remote 5 Offset

Remote 5 K -factor

Remote 5 THERM

Remote 5 THERM2

Remote 6 Offset

Remote 6 K -factor

Remote 6 THERM

Remote 6 THERM2

Remote 7 Offset

Remote 7 K -factor

Remote 7 THERM

Remote 7 THERM2

Remote 8 Offset

Remote 8 K -factor

Remote 8 THERM

Remote 8 THERM2

SDA

SCL

Device ID

Manufacturer ID

Local THERM Limit

Local THERM2 Limit

THERM Hysterisis

Software Reset

THERM Status

Remote Open Status

THERM2 Status

TMP468

SBOS762B – NOVEMBER 2016 – REVISED JUNE 2017

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Product Folder Links: TMP468

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7.6.1 Register Information

The TMP468 device contains multiple registers for holding configuration information, temperature measurement

results, and status information. These registers are described in Figure 21 and Table 3.

7.6.1.1 Pointer Register

shows the internal register structure of the TMP468 device. The 8-bit pointer register addresses a given data

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 TMP468 registers. The power-on-reset (POR) value of the pointer register is 00h

(0000 0000b). Table 3 lists a summary of the pointer values for the different registers. Writing data to unassigned

pointer values are ignored and does not affect the operation of the device. Reading an unassigned register

returns undefined data and is ACKed.

Figure 21. TMP468 Internal Register Structure

7.6.1.2 Local and Remote Temperature Value Registers

The TMP468 device has multiple 16-bit registers that hold 13-bit temperature measurement results. The 13 bits

of the local temperature sensor result are stored in register 00h. The 13 bits of the eight remote temperature

sensor results are stored in registers 01h through 08h. The four assigned LSBs of both the local (LT3:LT0) and

remote (RT3:RT0) sensors indicate the temperature value after the decimal point (for example, if the temperature

result is 10.0625°C, then the high byte is 0000 0101 and the low byte is 0000 1000). These registers are read-

only and are updated by the ADC each time a temperature measurement is complete. Asynchronous reads are

supported, so a read operation can occur at any time and results in valid conversion results being transmitted

once the first conversion is complete after power up for the channel being accessed. If after power up a read is

initiated before a conversion is complete, the read operation results in all zeros (0x0000).

7.6.1.3 Software Reset Register

The Software Reset Register allows the user to reset the TMP468 registers through software by setting the reset

bit (RST, bit 15) to 1. The power-on-reset value for this register is 0x0000. Resets are ignored when the device is

in lock mode, so writing a 1 to the RST bit does not reset any registers.

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