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ADM1033ARQZ Datenblatt(PDF) 7 Page - Analog Devices |
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ADM1033ARQZ Datenblatt(HTML) 7 Page - Analog Devices |
7 / 40 page ADM1033 Rev. 0 | Page 7 of 40 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 TACH ALERT Comp NC THERM VCC GND DRIVE SDA SMBusALERT LOCATION D+ FAN_FAULT/REF D– NC NC SCL TOP VIEW (Not to Scale) ADM1033 NC = NO CONNECT Figure 3. Pin Configuration Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1 DRIVE DRIVE Pin Drives the Fan. Open-drain output. Requires a pull-up resistor. 2 TACH Fan Speed Measurement Input. Connects to the fan’s TACH output to measure the fan speed. 3 ALERT Comp Open-Drain Active Low Output. Asserts low whenever a measurement goes outside its programmed limits, if not masked. Automatically goes high again when the measured parameter falls back within its limits. 4 NC No Connect. 5 GND Ground for Analog and Digital Circuitry. 6 VCC Power. Can be powered by 3.3 V standby power, if monitoring in low power states is required. 7 THERM Can be configured as an overtemperature interrupt output, or as an input to monitor PROCHOT output of an INTEL CPU. A timer measures assertion times on the THERM pin (either input or output). 8 FAN_FAULT/REF FAN_FAULT: Open-Drain Output. Asserts low whenever the fan stalls. REF: Analog Input Reference for THERM input. 9 D − Cathode Connection for the Thermal Diode or Diode-Connected Transistor. 10 D+ Anode Connection for the Thermal Diode or Diode-Connected Transistor. 11 NC No Connect. 12 NC No Connect. 13 LOCATION 8-Level Analog Input. Used to determine the correct SMBus version and the SMBus address (in fixed-and- discoverable mode), and to set the LLL bits in the UDID (in ARP-capable mode). 14 SMBusALERT Open-Drain Output. Alerts the system in the case of out-of-limit events such as overtemperature. Can be reset only with software. 15 SDA Serial Bus Bidirectional Data. Connects to the SMBus master’s data line. Requires a pull-up resistor, if one is not provided elsewhere in the system. 16 SCL Serial SMBus Clock Input. Connects to the SMBus master’s clock line. Requires a pull-up resistor, if one is not provided elsewhere in the system. |
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