EMC1043 Standard Microsystems Corp., EMC1043 Datasheet - Page 10

• Manufacturer Part Number: EMC1043
• Description: 1 Degree C Triple Temperature Sensor With Beta Compensation And Hotter Of Two Zones
• Manufacturer: Standard Microsystems Corp.

Revision 1.44 (04-14-08)
2.3.3
2.3.4
2.3.5
2.4
2.5
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START
START
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Send Byte
The Send Byte protocol is used to set the Internal Address Register to the correct Address as shown
in
read data from the register. The send byte protocol cannot be used to write data - if data is to be
written to a register then the write byte protocol must be used as described in
Receive Byte
The Receive Byte protocol is used to read data from a register when the internal register address
pointer is known to be at the right location (e.g. set via Send Byte). This can be used for consecutive
reads of the same register as shown in
SMBus Timing Diagram
The Timing for the SMBus is shown in
The EMC1043 may be ordered with one of four slave addresses as shown in
Attempting to communicate with the EMC1043 SMBus interface with an invalid slave address or invalid
protocol results in no response from the device and does not affect its register contents. The EMC1043
supports stretching of the SMCLK signal by other devices on the SMBus but will not perform this
operation itself.
The EMC1043 includes an SMBus time-out feature. Following a 25 ms period of inactivity on the
SMBus, the device will time-out and reset the SMBus interface.
SMBus Addresses
SMBus Timeout
Table
SLAVE ADDR
SLAVE ADDR
2.5. The Send Byte can be followed by the Receive Byte protocol described in
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7
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Table 2.6 Receive Byte Protocol
8
Table 2.4 Read Byte Protocol
Table 2.5 Send Byte Protocol
RD
1°C Triple Temperature Sensor with Beta Compensation and Hotter of Two Zones
WR
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DATASHEET
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Figure
Table
ACK
ACK
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2.6.
2.1.
REG. DATA
REG. ADDR
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8
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NACK
ACK
Section
Ordering
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SMSC EMC1043
2.3.1.
Table 2.6
Information.
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STOP
STOP
Datasheet
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