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LM89 bảng dữ liệu(PDF) 16 Page - Texas Instruments

tên linh kiện LM89
Giải thích chi tiết về linh kiện  LM89 ±0.75°C Accurate, Remote Diode And Local Digital Temperature Sensor With Two-Wire Interface
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LM89 bảng dữ liệu(HTML) 16 Page - Texas Instruments

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1
9
1
9
SMBCLK
D7
D6
D5
D4
D3
D2
D1
D0
SMBDat
a
Ack
by
LM89
Start
by
Master
Address byte.
No Ack
by
Master
Stop
by
Master
A6
A5
A4
A3
A2
A1
A0
Frame 1
Serial Bus Address Byte
Frame 2
Data Byte from the LM89
R/W
LM89
SNIS128D – AUGUST 2002 – REVISED JUNE 2014
www.ti.com
9.3.8.1 SMBus Timing Diagrams
Figure 9. LM89 Timing Diagram
(A) Serial Bus Write To The Internal Command Register Followed By A The Data Byte
Figure 10. LM89 Timing Diagram
(B) Serial Bus Write To The Internal Command Register
Figure 11. LM89 Timing Diagram
(C) Serial Bus Read From A Register With The Internal Command Register Preset To Desired Value
9.3.9 Serial Interface Reset
In the event that the SMBus Master is RESET while the LM89 is transmitting on the SMBData line, the LM89
must be returned to a known state in the communication protocol. This may be done in one of two ways:
1. When SMBData is LOW, the LM89 SMBus state machine resets to the SMBus idle state if either SMBData
or SMBCLK are held low for more than 35 ms (tTIMEOUT). Note that according to SMBus specification 2.0 all
devices are to timeout when either the SMBCLK or SMBData lines are held low for 25-35 ms. Therefore, to
insure a timeout of all devices on the bus the SMBCLK or SMBData lines must be held low for at least 35
ms.
2. When SMBData is HIGH, have the master initiate an SMBus start. The LM89 will respond properly to an
16
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Product Folder Links: LM89



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