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ADM1024 データシート(PDF) 11 Page - ON Semiconductor |
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ADM1024 データシート(HTML) 11 Page - ON Semiconductor |
11 / 29 page ADM1024 http://onsemi.com 11 Bits 4 to 6 of the Channel Mode Register enable or disable Pins 22 to 24 when they are configured as interrupt inputs by setting Bit 7 of the Channel Mode Register. This function is controlled for Pins 20 and 21 by Bits 6 and 7 of Configuration Register 2. Pins 17 and 18 can be configured as analog inputs or as inputs for external temperature−sensing diodes by programming Bit 2 of the Channel Mode Register. Bit 7 of the Channel Mode Register allows the processor core voltage ID bits (VID0 to VID4, Pins 24 to 20) to be reconfigured as interrupt inputs. A truth table for the Channel Mode Register is given in Table 2. Table 2. Channel Mode Register (Note 1) Channel Mode Register Bit Controls Pin(s) Function 0 5 0 = FAN1, 1 = AIN1 1 6 0 = FAN2, 1 = AIN2 2 17, 18 0 = 2.5 V, VCCP2, 1 = D2–, D2+ 3 Int. VCC Meas. 0 = 3.3 V, 1 = 5.0 V 4 24 0 = VID0, 1 = IRQ0 5 23 0 = VID1, 1 = IRQ1 6 22 0 = VID2, 1 = IRQ2 7 20–24 0 = VID0 to VID4, 1 = Interrupt Inputs 1. Power−On Default = 0000 0000 Table 3. A/D Output Code vs. VIN Input Voltage A/D Output +12 VIN +5.0 VIN VCC (3.3 V) VCC (5.0 V) +2.5 VIN +VCCP 1/2 AIN (1/2) Decimal Binary <0.062 <0.026 <0.0172 <0.026 <0.013 <0.014 <0.010 0 00000000 0.062–0.125 0.026–0.052 0.017–0.034 0.026–0.052 0.013–0.026 0.014–0.028 0.010–0.019 1 00000001 0.125–0.188 0.052–0.078 0.034–0.052 0.052–0.078 0.026–0.039 0.028–0.042 0.019–0.029 2 00000010 0.188–0.250 0.078–0.104 0.052–0.069 0.078–0.104 0.039–0.052 0.042–0.056 0.029–0.039 3 00000011 0.250–0.313 0.104–0.130 0.069–0.086 0.104–0.130 0.052–0.065 0.056–0.070 0.039–0.049 4 00000100 0.313–0.375 0.130–0.156 0.086–0.103 0.130–0.156 0.065–0.078 0.070–0.084 0.049–0.058 5 00000101 0.375–0.438 0.156–0.182 0.103–0.120 0.156–0.182 0.078–0.091 0.084–0.098 0.058–0.068 6 00000110 0.438–0.500 0.182–0.208 0.120–0.138 0.182–0.208 0.091–0.104 0.098–0.112 0.068–0.078 7 00000111 0.500–0.563 0.208–0.234 0.138–0.155 0.208–0.234 0.104–0.117 0.112–0.126 0.078–0.087 8 00001000 4.000–4.063 1.666–1.692 1.100–1.117 1.666–1.692 − − − 0.833–0.846 0.900–0.914 0.625–0.635 64 (1/4−Scale) 01000000 8.000–8.063 3.330–3.560 2.200–2.217 3.330–3.560 − − − 1.667–1.680 1.800–1.814 1.250–1.260 128 (1/2−Scale) 10000000 12.000–12.063 5.000–5.026 3.300–3.317 5.000–5.026 − − − 2.500–2.513 2.700–2.714 1.875–1.885 192 (3/4−Scale) 11000000 15.312–15.375 6.380–6.406 4.210–4.230 6.380–6.406 − − − 3.190–3.203 3.445–3.459 2.392–2.402 245 11110101 15.375–15.437 6.406–6.432 4.230–4.245 6.406–6.432 3.203–3.216 3.459–3.473 2.402–2.412 246 11110110 15.437–15.500 6.432–6.458 4.245–4.263 6.432–6.458 3.216–3.229 3.473–3.487 2.412–2.422 247 11110111 15.500–15.563 6.458–6.484 4.263–4.280 6.458–6.484 3.229–3.242 3.487–3.501 2.422–2.431 248 11111000 15.563–15.625 6.484–6.510 4.280–4.300 6.484–6.510 3.242–3.255 3.501–3.515 2.431–2.441 249 11111001 15.625–15.688 6.510–6.536 4.300–4.314 6.510–6.536 3.255–3.268 3.515–3.529 2.441–2.451 250 11111010 15.688–15.750 6.536–6.562 4.314–4.331 6.536–6.562 3.268–3.281 3.529–3.543 2.451–2.460 251 11111011 15.750–15.812 6.562–6.588 4.331–4.348 6.562–6.588 3.281–3.294 3.543–3.558 2.460–2.470 252 11111100 15.812–15.875 6.588–6.615 4.348–4.366 6.588–6.615 3.294–3.307 3.558–3.572 2.470–2.480 253 11111101 A−to−D Converter These inputs are multiplexed into the on−chip, successive approximation, Analog−to−Digital Converter (ADC). This has a resolution of eight bits. The basic input range is 0 V to 2.5 V, which is the input range of AIN1 and AIN2, but five of the inputs have built−in attenuators to allow measurement of 2.5 V, 5.0 V, 12 V, and the processor core voltages VCCP1 and VCCP2 without any external components. To allow for the tolerance of these supply voltages, the ADC produces an output of 3/4 full scale (decimal 192) for the nominal input |
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同様の説明 - ADM1024 |
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