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LM95235 Datasheet(PDF) 11 Page - National Semiconductor (TI) |
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LM95235 Datasheet(HTML) 11 Page - National Semiconductor (TI) |
11 / 25 page ![]() 1.0 Functional Description (Continued) 1.5 TEMPERATURE DATA FORMAT Temperature data can only be read from the Local and Remote Temperature registers. Remote temperature data with the digital filter off is repre- sented by an 10-bit plus sign, two’s complement word and 11-bit unsigned binary word with an LSb (Least Significant Bit) equal to 0.125˚C. The data format is a left justified 16-bit word available in two 8-bit registers. Unused bits report "0". Remote temperature data with the digital filter on is repre- sented by a 12-bit plus sign, two’s complement word and 13-bit unsigned binary word with an LSb (Least Significant Bit) equal to 0.03125˚C (1/32˚C). The data format is a left justified 16-bit word available in two 8-bit registers. Unused bits report "0". 11-bit, 2’s complement (10-bit plus sign) Temperature Digital Output Binary Hex +125˚C 0111 1101 0000 0000 7D00h +25˚C 0001 1001 0000 0000 1900h +1˚C 0000 0001 0000 0000 0100h +0.125˚C 0000 0000 0010 0000 0020h 0˚C 0000 0000 0000 0000 0000h −0.125˚C 1111 1111 1110 0000 FFE0h −1˚C 1111 1111 0000 0000 FF00h −25˚C 1110 0111 0000 0000 E700h −55˚C 1100 1001 0000 0000 C900h 11-bit, unsigned binary Temperature Digital Output Binary Hex +255.875˚C 1111 1111 1110 0000 FFE0h +255˚C 1111 1111 0000 0000 FF00h +201˚C 1100 1001 0000 0000 C900h +125˚C 0111 1101 0000 0000 7D00h Temperature Digital Output Binary Hex +25˚C 0001 1001 0000 0000 1900h +1˚C 0000 0001 0000 0000 0100h +0.125˚C 0000 0000 0010 0000 0020h 0˚C 0000 0000 0000 0000 0000h 13-bit, 2’s complement (12-bit plus sign) Temperature Digital Output Binary Hex +125˚C 0111 1101 0000 0000 7D00h +25˚C 0001 1001 0000 0000 1900h +1˚C 0000 0001 0000 0000 0100h +0.03125˚C 0000 0000 0000 1000 0008h 0˚C 0000 0000 0000 0000 0000h −0.03125˚C 1111 1111 1111 1000 FFF8h −1˚C 1111 1111 0000 0000 FF00h −25˚C 1110 0111 0000 0000 E700h −55˚C 1100 1001 0000 0000 C900h 13-bit, unsigned binary Temperature Digital Output Binary Hex +255.875˚C 1111 1111 1110 0000 FFE0h +255˚C 1111 1111 0000 0000 FF00h +201˚C 1100 1001 0000 0000 C900h +125˚C 0111 1101 0000 0000 7D00h +25˚C 0001 1001 0000 0000 1900h +1˚C 0000 0001 0000 0000 0100h +0.03125˚C 0000 0000 0000 1000 0008h 0˚C 0000 0000 0000 0000 0000h Local Temperature data is represented by a 10-bit plus sign, two’s complement word with an LSb (Least Significant Bit) equal to 0.125˚C. The data format is a left justified 16-bit word available in two 8-bit registers. Unused bits will always report "0". Local temperature readings greater than +127.875˚C are clamped to +127.875˚C, they will not roll- over to negative temperature readings. 11-bit, 2’s complement (10-bit plus sign) Temperature Digital Output Binary Hex +125˚C 0111 1101 0000 0000 7D00h +25˚C 0001 1001 0000 0000 1900h +1˚C 0000 0001 0000 0000 0100h +0.125˚C 0000 0000 0010 0000 0020h 0˚C 0000 0000 0000 0000 0000h −0.125˚C 1111 1111 1110 0000 FFE0h −1˚C 1111 1111 0000 0000 FF00h −25˚C 1110 0111 0000 0000 E700h −55˚C 1100 1001 0000 0000 C900h 20174927 FIGURE 3. Digital Filter Response in a typical Intel processor on a 65 nm or 90 nm process. The filter curves were purposely offset for clarity. www.national.com 11 |
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