8.5.3 Device Address

To communicate with the TMP114, the controller must first address target devices through an address byte. The

address byte has seven address bits and a read-write (R/W) bit that indicates the intent of executing a read or

write operation. Table 8-2 shows the TMP114 available in multiple versions, each with a different target address.

Table 8-2. Device Target Address

Product

Device Two-Wire Address

TMP114A

1001000

TMP114B

1001001

TMP114C

1001010

TMP114NC

1001101

TMP114NB

1001110

8.5.4 Bus Transactions

Data must be sent to and received from the target devices, and this is accomplished by reading from or writing to

registers in the target device.

Registers are locations in the memory of the target which contain information, whether it be the configuration

information or some sampled data to send back to the controller. The controller must write information to these

registers in order to instruct the target device to perform a task.

8.5.4.1 Auto-Increment

The TMP114 supports the use of the auto-increment feature. In the control register byte of the I2C transaction,

bit 7 is used as the auto-increment bit. If the bit is set to 0b, continuous reads or writes will only read and write to

the register specified in the register pointer. If the Auto-increment bit is set to 1b, continuous reads and writes will

increment the address pointer by 1 after every word of data has been read or written to the TMP114. This allows

the controller to read or write to multiple registers with a single transaction for faster communication.

Figure 8-9 shows the structure of the Control Register.

0

0

0

P3

P2

P1

P0

A

0

Register Pointer (N)

ACK from Target

Must be 0h

Auto-Increment

Target controls SDA line

Controller controls SDA line

Figure 8-9. Control Register

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TMP114

SNIS214A – JUNE 2021 – REVISED SEPTEMBER 2021

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