Datasheet

Frame1Two-WireSlaveAddressByte
(1)
Frame2DataMSByte
(2)
1
StartBy
Master
ACKBy
INA219
ACKBy
Master
From
INA219
1 9 1
9
SDA
SCL
0 0 A3 R/
W D15 D14 D13 D12 D11 D10 D9 D8
A2 A1 A0
Frame3DataLSByte
(2)
StopNoACKBy
(3)
Master
From
INA219
1
9
D7 D6 D5 D4 D3 D2 D1 D0
NOTES:(1)ThevalueoftheSlaveAddressByteisdeterminedbythesettingsoftheA0andA1pins.
RefertoTable1.
(2)Readdataisfromthelastregisterpointerlocation.Ifanewregisterisdesired,theregister
pointermustbeupdated.SeeFigure19.
(3)ACKbyMastercanalsobesent.
Frame1Two-WireSlaveAddressByte
(1)
Frame2RegisterPointerByte
StartBy
Master
ACKBy
INA219
ACKBy
INA219
1 9 1
ACKBy
INA219
1
D15 D14 D13 D12 D11 D10 D9 D8
9
9
SDA
SCL
1 0 0 A3 A2
A1 A0 R/W P7 P6 P5 P4 P3 P2 P1 P0
NOTE(1):ThevalueoftheSlaveAddressByteisdeterminedbythesettingsoftheA0andA1pins.RefertoTable1.
Frame4DataLSByteFrame3DataMSByte
ACKBy
INA219
StopBy
Master
1
D7 D6 D5 D4 D3 D2 D1 D0
9
INA219
www.ti.com SBOS448F –AUGUST 2008– REVISED SEPTEMBER 2011
Figure 15. Timing Diagram for Read Word Format
Figure 14. Timing Diagram for Write Word Format
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