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TMP400 Datasheet(PDF) 12 Page - Texas Instruments |
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TMP400 Datasheet(HTML) 12 Page - Texas Instruments |
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12 / 25 page  www.ti.com MINIMUM AND MAXIMUM REGISTERS SOFTWARE RESET TMP400 SBOS404 – DECEMBER 2007 The n-correction value must be stored in The Local Temperature Maximum Register may be two’s-complement format, yielding an effective data read by reading the high byte from pointer address range from –128 to +127. The n-correction value may 32h and the low byte from pointer address 33h. The be written to and read from pointer address 18h. The Local Temperature Maximum Register may also be register power-on reset value is 00h; thus, the read by using a two-byte read command from pointer register has no effect unless written to. The n-factor address 32h. The Local Temperature Maximum range is shown in Table 7. Register is reset at power-on by executing the chip reset command, or by writing any value to any of Table 7. N-Factor Range pointer addresses 30h through 37h. The reset value for these registers is 80h/00h. NADJUST The Remote Temperature Minimum Register may be BINARY HEX DECIMAL N read by reading the high byte from pointer address 01111111 7F 127 1.747977 34h and the low byte from pointer address 35h. The 00001010 0A 10 1.042759 Remote Temperature Minimum Register may also be 00001000 08 8 1.035616 read by using a two-byte read command from pointer 00000110 06 6 1.028571 address 34h. The Remote Temperature Minimum Register is reset at power-on by executing the chip 00000100 04 4 1.021622 reset command, or by writing any value to any of 00000010 02 2 1.014765 pointer addresses 30h through 37h. The reset value 00000001 01 1 1.011371 for these registers is 7Fh/F0h. 00000000 00 0 1.008 The Remote Temperature Maximum Register may be 11111111 FF –1 1.004651 read by reading the high byte from pointer address 11111110 FE –2 1.001325 36h and the low byte from pointer address 37h. The 11111100 FC –4 0.994737 Remote Temperature Maximum Register may also be 11111010 FA –6 0.988235 read by using a two-byte read command from pointer address 36h. The Remote Temperature Maximum 11111000 F8 –8 0.981818 Register is reset at power-on by executing the chip 11110110 F6 –10 0.975484 reset command, or by writing any value to any of 10000000 80 –128 0.706542 pointer addresses 30h through 37h. The reset value for these registers is 80h/00h. The TMP400 stores the minimum and maximum temperatures measured since power-on, chip-reset, The TMP400 may be reset by writing any value to or minimum and maximum register reset for both the Pointer Register FCh. A reset restores the power-on local and remote channels. The Local Temperature reset state to all of the TMP400 registers as well as Minimum Register may be read by reading the high aborts any conversion in process and clears the byte from pointer address 30h and the low byte from ALERT pin. pointer address 31h. The Local Temperature The TMP400 also supports reset via the Two-Wire Minimum Register may also be read by using a general call address (00000000). The TMP400 two-byte read command from pointer address 30h. acknowledges the general call address and responds The Local Temperature Minimum Register is reset at to the second byte. If the second byte is 00000110, power-on, by executing the chip-reset command, or the TMP400 latches the status of the address pins by writing any value to any of pointer addresses 30h and executes a software reset. A 500 µs time delay through 37h. The reset value for these registers is must be observed after a general-call command. The 7Fh/F0h. TMP400 takes no action in response to other values in the second byte. 12 Submit Documentation Feedback Copyright © 2007, Texas Instruments Incorporated Product Folder Link(s): TMP400 |
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