Datasheet
D7 D6 D5 D4 D3 D2 D1 D0
1 9 1 9
Ack
by
LM95221
Start by
Master
Repeat
Start by
Master
R/W
Frame 1
Serial Bus Address Byte
Frame 2
Command Byte
Ack
by
LM95221
D7 D6 D5 D4 D3 D2 D1 D0
1 9 1 9
Ack
by
LM95221
R/W
Frame 3
Serial Bus Address Byte
Frame 4
Data Byte from the LM95221
No Ack
by
Master
Stop
by
Master
SMBCLK
SMBDAT
SMBCLK
(Continued)
SMBDAT
(Continued)
A5 A3 A2 A0A6 A4 A1
A5 A3 A2 A0A6 A4 A1
D7 D6 D5 D4 D3 D2 D1 D0
1 9 1 9
Ack
by
LM95221
Start by
Master
R/W
Frame 1
Serial Bus Address Byte
Frame 2
Data Byte from the LM95221
NoAck
by
Master
SMBCLK
SMBDAT
Stop
by
Master
A5 A3 A2 A0
A6 A4
A1
D7 D6 D5 D4 D3 D2 D1 D0
1 9 1 9
Ack
by
LM95221
Start by
Master
R/W
Frame 1
Serial Bus Address Byte
Frame 2
Command Byte
Ack by
LM95221
SMBCLK
SMBDAT
A5 A3 A2 A0A6 A4 A1
Stop
by
Master
D7 D6 D5 D4 D3 D2 D1 D0
1 9 1 9
Ack
by
LM95221
Start by
Master
R/W
Frame 1
Serial Bus Address Byte
Frame 2
Command Byte
Ack
by
LM95221
D7 D6 D5 D4 D3 D2 D1 D0
1 9
Frame 3
Data Byte
Ack by
LM95221
Stop
by
Master
SMBCLK
SMBDAT
SMBCLK
(Continued)
SMBDAT
(Continued)
A5 A3 A2 A0A6 A4 A1
LM95221
SNIS134B –MAY 2004–REVISED MARCH 2013
www.ti.com
SMBus Timing Diagrams
Figure 8. Serial Bus Write to the internal Command Register followed by a the Data Byte
Figure 9. Serial Bus Write to the Internal Command Register
Figure 10. Serial Bus Read from a Register with the Internal Command Register preset to desired value.
Figure 11. Serial Bus Write followed by a Repeat Start and Immediate Read
12 Submit Documentation Feedback Copyright © 2004–2013, Texas Instruments Incorporated
Product Folder Links: LM95221