EMC2102-DZK-TR SMSC, EMC2102-DZK-TR Datasheet - Page 15
EMC2102-DZK-TR
Manufacturer Part Number
EMC2102-DZK-TR
Description
Industrial Temperature Sensors RPM Fan Contrllr
Manufacturer
SMSC
Datasheet
1.EMC2102-DZK-TR.pdf
(53 pages)
Specifications of EMC2102-DZK-TR
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
Chapter 4 System Management Bus Interface Protocol
.
SMSC EMC2102
4.1
SMCLK
SMDTA
START
1
P
The EMC2102 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
however the EMC2102 will not stretch the clock signal.
The EMC2102 is SMBus 2.0 compatible and supports Send Byte, Read Byte, Receive Byte and Write
Byte as valid protocols as shown below. It will respond to the Alert Response Address protocol but is
not in full compliance.
All of the below protocols use the convention in
The Write Byte is used to write one byte of data to the registers as shown below
ADDRESS
Write Byte
SLAVE
T
BUF
7
S
T
T
S - Start Condition
HD:STA
LOW
WR
1
T
HD:DAT
T
RISE
Figure 4.1 SMBus Timing Diagram
# of bits sent
DATA SENT
ACK
TO DEVICE
Table 4.2 Write Byte Protocol
1
Table 4.1 Protocol Format
T
HIGH
DATASHEET
T
REGISTER
SU:DAT
ADDRESS
T
FALL
15
8
DATA SENT TO
# of bits sent
Figure
THE HOST
Table
4.1. Stretching of the SMCLK signal is supported,
4.1.
ACK
1
S
T
T
SU:STA
HD:STA
REGISTER
DATA
8
P - Stop Condition
Revision 2.02 (05-17-07)
Table
ACK
1
T
SU:STO
4.2:
STOP
P
1
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