SE95U,025 NXP Semiconductors, SE95U,025 Datasheet - Page 9

• Manufacturer Part Number: SE95U,025
• Description: IC TEMP SENSOR DGTL
• Manufacturer: NXP Semiconductors

Specifications of SE95U,025

• Function: Temp Sensor, Watchdog
• Topology: ADC (Sigma Delta), Comparator, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: I²C™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 2.8 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: Die
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
SE95_7
Product data sheet
8.4 Configuration register
8.5 Temperature register
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.
The Configuration (Conf) register is a read/write register and contains an 8-bit
non-complement data byte that is used to configure the device for different operating
conditions.
Table 6.
Legend: * = default value.
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 Significant Byte (MSByte) and one
Least Significant Byte (LSByte). However, only 13 bits of those two bytes are used to store
the Temp data in two’s complement format with the resolution of 0.03125 C.
shows the bit arrangement of the Temp data in the data bytes.
Table 7.
Bit
7
6 and 5
4 and 3
2
1
0
MSByte
D15 D14 D13 D12 D11 D10
7
6
Symbol
reserved
RATEVAL[1:0]
OS_F_QUE[1:0]
OS_POL
OS_COMP_INT
SHUTDOWN
Conf register
Temp register
Table 6
5
Ultra high accuracy digital temperature sensor and thermal watchdog
4
shows the bit assignments of this register.
Rev. 07 — 2 September 2009
3
Access
R/W
R/W
R/W
R/W
R/W
R/W
2
D9
1
Value
0*
00*
01
10
11
00*
01
10
11
0*
1
0*
1
0
0*
1
D8
0
LSByte
D7
7
Description
reserved for manufacturer’s use
sets the conversion rate
OS fault queue programming
OS polarity selection
OS operation mode selection
operation mode
10 conversion/s
0.125 conversion/s
1 conversion/s
30 conversion/s
queue value = 1
queue value = 2
queue value = 4
queue value = 6
OS active LOW
OS active HIGH
OS comparator
OS interrupt
normal
shutdown
D6
6
D5
5
D4
4
D3
3
© NXP B.V. 2009. All rights reserved.
D2
2
Table 7
SE95
D1
1
9 of 27
D0
0