LM75BDP NXP Semiconductors, LM75BDP Datasheet - Page 7

• Manufacturer Part Number: LM75BDP
• Description: IC, TEMP SENSOR, DIGITAL, 8-TSSOP
• Manufacturer: NXP Semiconductors

Specifications of LM75BDP

• Ic Output Type: Digital
• Sensing Accuracy Range: ± 3°C
• Supply Current: 100µA
• Supply Voltage Range: 2.8V To 5.5V
• Resolution (bits): 11bit
• Sensor Case Style: TSSOP
• No. Of Pins: 8
• Base Number: 75
• Temperature Sensing Range: -55°C To +125°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
LM75B_2
Product data sheet
7.4.1 Pointer register
7.4.2 Configuration register
The Pointer register contains an 8-bit data byte, of which the two LSB bits represent the
pointer value of the other four registers, and the other 6 MSB bits are equal to 0, as shown
in
select the data register for write/read operation by including the pointer data byte in the
bus command.
Table 5.
Table 6.
Because the Pointer value is latched into the Pointer register when the bus command
(which includes the pointer byte) is executed, a read from the LM75B may or may not
include the pointer byte in the statement. To read again a register that has been recently
read and the pointer has been preset, the pointer byte does not have to be included. To
read a register that is different from the one that has been recently read, the pointer byte
must be included. However, a write to the LM75B must always include the pointer byte in
the statement. The bus communication protocols are described in
At power-up, the Pointer value is equal to 00 and the Temp register is selected; users can
then read the Temp data without specifying the pointer byte.
The Configuration register (Conf) is a write/read register and contains an 8-bit
non-complement data byte that is used to configure the device for different operation
conditions.
Table 7.
Legend: * = default value.
B7
0
B1
0
0
1
1
Bit
B[7:5]
B[4:3]
B2
Table 5
Symbol
reserved
OS_F_QUE[1:0] R/W
OS_POL
and
Pointer register
Pointer value
Conf register
Table 7
B6
0
B0
0
1
0
1
Table
shows the bit assignments of this register.
6. The Pointer register is not accessible to the user, but is used to
Rev. 02 — 9 December 2008
B5
0
Selected register
Temperature register (Temp)
Configuration register (Conf)
Hysteresis register (Thyst)
Overtemperature shutdown register (Tos)
Access Value Description
R/W
R/W
000*
00*
01
10
11
0*
1
B4
0
Digital temperature sensor and thermal watchdog
reserved for manufacturer’s use; should be kept as
zeroes for normal operation
OS fault queue programming
OS polarity selection
queue value = 1
queue value = 2
queue value = 4
queue value = 6
OS active LOW
OS active HIGH
B3
0
B2
0
Section
B[1:0]
pointer value
© NXP B.V. 2008. All rights reserved.
7.10.
LM75B
7 of 29