emc2106 Standard Microsystems Corp., emc2106 Datasheet - Page 20
emc2106
Manufacturer Part Number
emc2106
Description
Emc2106 Dual Rpm-based Linear Fan Controller With Hardware Thermal Shutdown
Manufacturer
Standard Microsystems Corp.
Datasheet
1.EMC2106.pdf
(107 pages)
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Part Number
Manufacturer
Quantity
Price
Part Number:
emc2106-DZK-TR
Manufacturer:
SMSC
Quantity:
20 000
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Chapter 4 Communications
Revision 1.74 (05-08-08)
4.1
4.2
SMDATA
START
0 -> 1
SMCLK
The EMC2106 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 EMC2106 will not stretch the clock signal.
The EMC2106 powers up as an SMBus client(after loading from EEPROM as applicable).
The EMC2106 contains a single SMBus interface. The SMBus address is determined by the
ADDR_SEL pin (see
support Send Byte, Read Byte, Receive Byte and the Alert Response Address as valid protocols.
These protocols are used as shown below.
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
System Management Bus Interface Protocol
Write Byte
0101_111
P
SLAVE
T
BUF
S
T
T
S - Start Condition
HD:STA
LOW
WR
0
T
Section
HD:DAT
T
RISE
Figure 4.1 SMBus Timing Diagram
# of bits sent
DATA SENT
ACK
TO DEVICE
Table 4.2 Write Byte Protocol
0
Table 4.1 Protocol Format
4.7)The EMC2106 client interfaces are SMBus 2.0 compatible and
T
HIGH
DATASHEET
Dual RPM-Based Linear Fan Controller with Hardware Thermal Shutdown
REGISTER
ADDRESS
T
SU:DAT
T
XXh
FALL
20
DATA SENT TO
# of bits sent
Figure
THE HOST
Table
4.1. Stretching of the SMCLK signal is supported,
4.1.
ACK
0
S
T
T
SU:STA
HD:STA
REGISTER
DATA
XXh
P - Stop Condition
Table
ACK
0
T
SU:STO
SMSC EMC2106
4.2:
Datasheet
STOP
1 -> 0
P
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