Datenblatt-Suchmaschine für elektronische Bauteile |
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TMP112 Datenblatt(PDF) 7 Page - Texas Instruments |
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TMP112 Datenblatt(HTML) 7 Page - Texas Instruments |
7 / 25 page POINTER REGISTER TEMPERATURE REGISTER I/O Control Interface SCL SDA Temperature Register Configuration Register T LOW Register T HIGH Register Pointer Register TMP112 www.ti.com ......................................................................................................................................................... SBOS473B – MARCH 2009 – REVISED JUNE 2009 Figure 11 shows the internal register structure of the The Temperature Register of the TMP112 is TMP112. The 8-bit Pointer Register of the device is configured as a 12-bit, read-only register used to address a given data register. The Pointer (Configuration Register EM bit = '0'; see the Extended Register uses the two LSBs (see Table 11) to identify Mode section), or as a 13-bit, read-only register which of the data registers should respond to a read (Configuration Register EM bit = '1') that stores the or write command. Table 1 identifies the bits of the output of the most recent conversion. Two bytes must Pointer Register byte. During a write command, P2 be read to obtain data, and are described in Table 3 through P7 must always be '0'. Table 2 describes the and Table 4. Note that byte 1 is the most significant pointer address of the registers available in the byte (MSB), followed by byte 2, the least significant TMP112. The power-up reset value of P1/P0 is '00'. byte (LSB). The first 12 bits (13 bits in Extended By default, the TMP112 reads the temperature on mode) are used to indicate temperature. The least power-up. significant byte does not have to be read if that information is not needed. The data format for temperature is summarized in Table 5 and Table 6. One LSB equals 0.0625°C. Negative numbers are represented in binary twos complement format. Following power-up or reset, the Temperature Register reads 0°C until the first conversion is complete. Bit D0 of byte 2 indicates Normal mode (EM bit = '0') or Extended mode (EM bit = '1'), and can be used to distinguish between the two temperature register data formats. The unused bits in the Temperature Register always read '0'. Table 3. Byte 1 of Temperature Register(1) D7 D6 D5 D4 D3 D2 D1 D0 T11 T10 T9 T8 T7 T6 T5 T4 (T12) (T11) (T10) (T9) (T8) (T7) (T6) (T5) (1) Extended mode 13-bit configuration shown in parentheses. Table 4. Byte 2 of Temperature Register(1) Figure 11. Internal Register Structure D7 D6 D5 D4 D3 D2 D1 D0 T3 T2 T1 T0 0 0 0 0 Table 1. Pointer Register Byte (T4) (T3) (T2) (T1) (T0) (0) (0) (1) P7 P6 P5 P4 P3 P2 P1 P0 (1) Extended mode 13-bit configuration shown in parentheses. 0 0 0 0 0 0 Register Bits Table 2. Pointer Addresses 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) Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): TMP112 |
Ähnliche Teilenummer - TMP112_1 |
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Ähnliche Beschreibung - TMP112_1 |
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