Dual Channel 1°C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications
Datasheet
4.2.1
Write Byte
The Write Byte is used to write one byte of data to the registers, as shown in Table 4.2.
Table 4.2 Write Byte Protocol
SLAVE
ADDRESS
REGISTER
ADDRESS
REGISTER
DATA
START
1 -> 0
WR
ACK
ACK
ACK
STOP
YYYY_YYY
0
0
XXh
0
XXh
0
0 -> 1
4.2.2
Read Byte
The Read Byte protocol is used to read one byte of data from the registers as shown in Table 4.3.
Table 4.3 Read Byte Protocol
START
SLAVE
ADDRESS
WR
ACK
REGISTER
ADDRESS
ACK
START
SLAVE
ADDRESS
RD
ACK
REGISTER
DATA
NACK
STOP
1 -> 0
YYYY_
YYY
0
0
XXh
0
1 -> 0
YYYY_
YYY
1
0
XX
1
0 -> 1
4.2.3
Send Byte
The Send Byte protocol is used to set the internal address register pointer to the correct address
location. No data is transferred during the Send Byte protocol as shown in Table 4.4.
Table 4.4 Send Byte Protocol
SLAVE
ADDRESS
REGISTER
ADDRESS
START
1 -> 0
WR
ACK
ACK
STOP
YYYY_YYY
0
0
XXh
0
0 -> 1
4.2.4
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 is used for consecutive reads
of the same register as shown in Table 4.5.
Table 4.5 Receive Byte Protocol
SLAVE
START
ADDRESS
RD
ACK
REGISTER DATA
NACK
STOP
1 -> 0
YYYY_YYY
1
0
XXh
1
0 -> 1
Revision 1.0 (07-11-13)
16
SMSC EMC1182
DATASHEET
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