SE95_7
?NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 07 2 September 2009
9 of 27
NXP Semiconductors
SE95
Ultra high accuracy digital temperature sensor and thermal watchdog
At power-up, the pointer value is preset to logic 0 for register Temp; users can then read
the temperature without specifying the pointer byte.
8.4 Conguration register
The Conguration (Conf) register is a read/write register and contains an 8-bit
non-complement data byte that is used to congure the device for different operating
conditions.
T
ab
le
6 shows the bit assignments of this register.
8.5 Temperature register
The Temperature (Temp) register holds the digital result of temperature measurement or
monitor at the end of each analog to digital conversion. This register is read only and
contains two 8-bit data bytes consisting of one Most Signicant Byte (MSByte) and one
Least Signicant Byte (LSByte). However, only 13 bits of those two bytes are used to store
the Temp data in twos complement format with the resolution of 0.03125 癈.
T
ab
le
7
shows the bit arrangement of the Temp data in the data bytes.
Table 6.
Conf register
Legend: * = default value.
Bit
Symbol
Access
Value
Description
7
reserved
R/W
0*
reserved for manufacturers use
6 and 5
RATEVAL[1:0]
R/W
sets the conversion rate
00*
10 conversion/s
01
0.125 conversion/s
10
1 conversion/s
11
30 conversion/s
4 and 3
OS_F_QUE[1:0] R/W
OS fault queue programming
00*
queue value = 1
01
queue value = 2
10
queue value = 4
11
queue value = 6
2
OS_POL
R/W
OS polarity selection
0*
OS active LOW
1
OS active HIGH
1
OS_COMP_INT R/W
OS operation mode selection
0*
OS comparator
1
OS interrupt
0
SHUTDOWN
R/W
0
operation mode
0*
normal
1
shutdown
Table 7.
Temp register
MSByte
LSByte
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
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