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TMP101-Q1 Datasheet(PDF) 6 Page - Texas Instruments

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Part # TMP101-Q1
Description  DIGITAL TEMPERATURE SENSOR WITH I2C INTERFACE
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TMP101-Q1 Datasheet(HTML) 6 Page - Texas Instruments

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I/O
Control
Interface
SCL
SDA
Temperature
Register
Configuration
Register
T
LOW
Register
T
HIGH
Register
Pointer
Register
TMP100-Q1
TMP101-Q1
SBOS581
– SEPTEMBER 2011
www.ti.com
POINTER REGISTER
Figure 8 shows the internal register structure of the TMP100-Q1 and TMP101-Q1. The 8-bit Pointer Register of
the TMP100-Q1 and TMP101-Q1 is used to address a given data register. The Pointer Register uses the two
LSBs to identify which of the data registers should respond to a read or write command. Table 1 identifies the
bits of the Pointer Register byte. Table 2 describes the pointer address of the registers available in the
TMP100-Q1 and TMP101-Q1. Power-up Reset value of P1/P0 is 00.
Figure 8. Internal Register Structure of the TMP100-Q1 and TMP101-Q1
Table 1. Pointer Register Type
P7
P6
P5
P4
P3
P2
P1
P0
0
0
0
0
0
0
Register Bits
Table 2. Pointer Addresses of the TMP100-Q1 and
TMP101-Q1 Registers
P1
P0
REGISTER
0
0
Temperature Register (READ Only)
0
1
Configuration Register (READ/WRITE)
1
0
TLOW Register (READ/WRITE)
1
1
THIGH Register (READ/WRITE)
TEMPERATURE REGISTER
The Temperature Register of the TMP100-Q1 or TMP101-Q1 is a 12-bit read-only register that stores the output
of the most recent conversion. Two bytes must be read to obtain data and are described in Table 3 and Table 4.
The first 12 bits are used to indicate temperature with all remaining bits equal to zero. Data format for
temperature is summarized in Table 5. Following power-up or reset, the Temperature Register will read 0
°C until
the first conversion is complete.
Table 3. Byte 1 of Temperature Register
D7
D6
D5
D4
D3
D2
D1
D0
T11
T10
T9
T8
T7
T6
T5
T4
6
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Copyright
© 2011, Texas Instruments Incorporated
Product Folder Link(s): TMP100-Q1 TMP101-Q1


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