TMP1075DR datasheet(18/48 Pages) TI

18 / 48 page

Start Data Transfer: A change in the state of the SDA line from high to low when the SCL line is high defines a

START condition. Each data transfer is initiated with a START condition.

Stop Data Transfer: A change in the state of the SDA line from low to high when the SCL line is high defines a

STOP condition. Each data transfer is terminated with a repeated START or STOP condition.

Data Transfer: The number of data bytes transferred between a START and a STOP condition is not limited and

is determined by the host device. The receiver acknowledges the transfer of data.

Acknowledge: Each receiving device, when addressed, is obliged to generate an Acknowledge bit. A device

that acknowledges must pull down the SDA line during the Acknowledge clock pulse in such a way that the SDA

line is stable low during the high period of the Acknowledge clock pulse. Setup and hold times must be taken

into account. On a host receive, the termination of the data transfer can be signaled by the host generating a

Not-Acknowledge on the last byte that is transmitted by the target device.

9.3.4 Two-Wire Timing Diagrams

Frame 1 Two Wire Device Address Byte

Frame 2 Pointer Register Byte

Frame 4 Data Byte 2

Start By

Host

ACK By

Device

ACK By

Device

ACK By

Device

Stop By

Host

D 1

Frame 3 Data Byte 1

ACK By

Device

D15

SDA

(Continued)

SCL

(Continued)

D14 D13

D12

D11 D10

SDA

SCL

R/W

Figure 9-3. Two-Wire Timing Diagram for Write Word Format

Frame 1 Two-Wire Device Address Byte

Start By

Master

ACK By

Device

ACK By

Device

StopBy

Master

Frame 3 Data Byte 1

ACK By

Device

D15

SDA

(Continued)

SCL

(Continued)

D14

D13 D12 D11 D10

SDA

SCL

R/W

…

Frame 2 Pointer Register Byte

Figure 9-4. Two-Wire Timing Diagram for Write Single Byte Format

TMP1075

SBOS854E – MARCH 2018 – REVISED AUGUST 2021

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