ADM9240ARU Analog Devices, ADM9240ARU Datasheet
ADM9240ARU
Specifications of ADM9240ARU
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ADM9240ARU Summary of contents
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... registered trademark of Philips Corporation. REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices ...
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ADM9240–SPECIFICATIONS Parameter POWER SUPPLY Supply Voltage Supply Current TEMPERATURE-TO-DIGITAL CONVERTER Accuracy Resolution ANALOG-TO-DIGITAL CONVERTER (INCLUDING MUX AND ATTENUATORS) Total Unadjusted Error, TUE Differential Nonlinearity, DNL Power Supply Sensitivity Total Monitoring Cycle Time Input Resistance ANALOG OUTPUT ...
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Parameter OPEN-DRAIN SERIAL DATA BUS OUTPUT (SDA) Output Low Voltage High Level Output Current SERIAL BUS DIGITAL INPUTS (SCL, SDA) Input High Voltage Input Low Voltage Hysteresis DIGITAL INPUT LOGIC LEVELS (A0, ...
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... V) CC section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. THERMAL CHARACTERISTICS 24-Lead Small Outline Package C/Watt, JA Model ADM9240ARU Bit 6 (A6) 1/f SCL HD;DAT SU ...
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Pin Number Mnemonic 1 NTEST_OUT/ SDA 4 SCL 5 FAN1 6 FAN2 GNDD INT 10 11 NTEST_IN/AOUT RESET 12 13 GNDA 14 +V CCP2 15 + ...
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ADM9240 GENERAL DESCRIPTION The ADM9240 is a complete system hardware monitor for microprocessor-based systems. The device communicates with the system via a serial System Management Bus. The serial bus controller has two hardwired address lines for device selection (Pin 1 ...
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SERIAL BUS INTERFACE Control of the ADM9240 is carried out via the serial bus. The ADM9240 is connected to this bus as a slave device, under the control of a master device, e.g., the PIIX4. The ADM9240 has a 7-bit ...
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ADM9240 When reading data from a register there are two possibilities the ADM9240’s Address Pointer Register value is un- known or not the desired value first necessary to set it to the correct value before data ...
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The input ranges of the analog inputs are shown in more detail in Table I. The +V and +V inputs are used to measure processor CCP1 CCP2 core voltages, and have an input range from 3.6 V. ...
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ADM9240 SETTING OTHER INPUT RANGES If any of the inputs is unused, and there is a requirement for monitoring another power supply such as –12 V, the input range of the unused input can easily be scaled and offset to ...
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MONITORING CYCLE TIME The monitoring cycle begins when a one is written to the Start Bit (Bit 0), and a zero to the INT_Clear Bit (Bit 3) of the Con- figuration Register. INT_Enable (Bit 1) should be set to one ...
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ADM9240 FAN INPUTS Two inputs are provide for monitoring the condition of cooling fans. Signal conditioning in the ADM9240 accommodates the slow rise and fall times typical of fan tachometer outputs. The maximum input signal range ...
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To accommodate fans of different speed and/or different num- bers of output pulses per revolution, a prescaler (divisor may be added before the counter. The default value is 2, which gives a count of ...
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ADM9240 The chassis intrusion circuit should be designed so that it can be reset by pulling its output low. A suitable chassis intrusion cir- cuit using a phototransistor is shown in Figure 8. Light falling on the phototransistor when the ...
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INTERRUPT CLEARING Reading an Interrupt Status Register will output the contents of the Register, then clear it. It will remain cleared until the moni- toring cycle updates it, so the next read operation should not be performed on the register ...
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ADM9240 The structure of the NAND tree is shown in Figure 13. Beginning with A1 and working clockwise around the chip, each pin can be toggled and a resulting toggle can be observed on NTEST_OUT/A0. Allow for a typical propagation ...
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APPLICATION CIRCUIT Figure 14 shows a generic application circuit using the AD9240. The analog monitoring inputs are connected to the power supplies including two processor core voltage inputs. The VID inputs are connected to the processor voltage ID pins. There ...
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ADM9240 Bit Name 7–0 Address Pointer Address Description 15h Test Register 19h Programmed Value of Analog Output 20h +2.5 V Measured Value 21h +V Measured Value CCP1 22h +3.3 V Measured Value 23h +5 V Measured Value 24h +12 V ...
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Table VII. Register 40h, Configuration Register (Power-On Default = 08h) Bit Name R/W 0 START R/W INT_Enable 1 R/W 2 Reserved INT_Clear 3 R/W RESET 4 R/W 5 Reserved R/W 6 CI_Reset R/W 7 Initialization R/W Table VIII. Register 41h, ...
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ADM9240 Table X. Register 43h, INT Interrupt Mask Register 1 (Power-On Default = 00h) Bit Name R/W 0 +2.5 V Read/Write 1 +V Read/Write CCP1 2 +3.3 V Read/Write Read/Write 4 Temp Read/Write 5 Reserved Read/Write 6 ...
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Table XV. Register 48h, Serial Address Register (Power-On Default = 0010 11(A1)(A0)) Bit Name 0–6 Serial Bus Address Table XVI. Register 49h, VID 4/Device ID Register (Power-On Default 1000000(VID4)) Bit Name R/W 0 VID4 Read 1–7 Reserved Read/Write Table XVII. ...
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ADM9240 0.006 (0.15) 0.002 (0.05) SEATING PLANE OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 24-Lead TSSOP (RU-24) 0.311 (7.90) 0.303 (7.70 PIN 1 0.0433 (1.10) MAX 8 0.0118 (0.30) 0.0256 (0.65) 0 0.0079 (0.20) BSC ...