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SA56004X
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?NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 7  25 February 2013
21 of 43
NXP Semiconductors
SA56004X
Digital temperature sensor with overtemperature alarms
a.  Write Byte format (to write a data byte to the device register)
b.  Read Byte format (to read a data byte from the device register)
c.  Receive Byte format (to read a data byte from already pointed register)
d.  Send Byte format
Fig 9.    SMBus interface protocols
1   2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
SCLK
a6    a5    a4    a3    a2    a1    a0
DATA
D7   D6   D5   D4   D3   D2   D1   D0
device address
device register command
W
A
S
START
A
(cont.)
(cont.)
2  21
1
2
3
4
5
6
7
8
9
SCLK
D7   D6   D5   D4   D3   D2   D1
SDATA
data to be written to register
A
P
STOP
D0
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
SCLK
a6    a5    a4    a3    a2    a1    a0
SDATA
D7   D6   D5   D4   D3   D2   D1   D0
device address
device register command
W
A
S
START
A
(cont.)
(cont.)
2
22
P
STOP
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
SCLK
a6    a5    a4    a3    a2    a1    a0
DATA
D7   D6   D5   D4   D3   D2   D1   D0
device address
data from device register
R
A
S
RESTART
NA
P
STOP
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
SCLK
a6    a5    a4    a3    a2    a1    a0
DATA
D7   D6   D5   D4   D3   D2   D1   D0
device address
data from device register
R
A
S
RESTART
NA
P
STOP
(cont.)
(cont.)
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
SCLK
a6    a5    a4    a3    a2    a1    a0
DATA
D7   D6   D5   D4   D3   D2   D1   D0
device address
device register command
W
A
S
START
A
2
222
P
STOP
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