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EMC2101-R-ACZL-TR датащи(PDF) 15 Page - SMSC Corporation

номер детали EMC2101-R-ACZL-TR
подробное описание детали  SMBus Fan Control with 1째C Accurate Temperature Monitoring
PDF  57 Pages
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производитель  SMSC [SMSC Corporation]
домашняя страница  http://www.smsc.com
Logo SMSC - SMSC Corporation

EMC2101-R-ACZL-TR датащи(HTML) 15 Page - SMSC Corporation

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SMBus Fan Control with 1°C Accurate Temperature Monitoring
Datasheet
SMSC EMC2101
15
Revision 2.54 (06-16-09)
DATASHEET
Chapter 4 System Management Bus Interface Protocol
4.1
System Management Bus Interface Protocol
The EMC2101 communicates with a host controller, such as an SMSC SIO, through the SMBus. The
SMBus is a two-wire serial communication protocol between a computer host and its peripheral
devices. A detailed timing diagram is shown in Figure 4.1. Stretching of the SMCLK signal is supported,
however the EMC2101 will not stretch the clock signal.
The EMC2101 powers up as an SMBus client (after loading from EEPROM as applicable).
The EMC2101 is SMBus 2.0 compatible and supports Send Byte, Read Byte, Receive Byte and the
Alert Response Address as valid protocols as shown below.
All of the below protocols use the convention in Table 4.1.
4.2
Write Byte
The Write Byte is used to write one byte of data to the registers as shown below Table 4.2.
Figure 4.1 SMBus Timing Diagram
Table 4.1 Protocol Format
DATA SENT
TO DEVICE
DATA SENT TO
THE HOST
# of bits sent
# of bits sent
Table 4.2 Write Byte Protocol
START
SLAVE
ADDRESS
WR
ACK
REGISTER
ADDRESS
ACK
REGISTER
DATA
ACK
STOP
1
7
1
181
8
1
1
SMDTA
SMCLK
TLOW
TRISE
THIGH
TFALL
TBUF
THD:STA
P
S
S - Start Condition
P - Stop Condition
THD:DAT
TSU:DAT
TSU:STA
THD:STA
P
TSU:STO
S



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