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ADT7490ARQZ-R7 bảng dữ liệu(PDF) 54 Page - ON Semiconductor |
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ADT7490ARQZ-R7 bảng dữ liệu(HTML) 54 Page - ON Semiconductor |
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54 / 75 page  ADT7490 http://onsemi.com 54 Table 39. Register 0x41 — Interrupt Status Register 1 (Power−On Default = 0x00) Bit No. Mnemonic R/W Description [0] +2.5 VIN/ THERM Read−only +2.5 VIN = 1 indicates that the 2.5 VIN high or low limit has been exceeded. This bit is cleared on a read of the status register only if the error condition has subsided. If Pin 22 is configured as THERM, this bit is asserted when the timer limit has been exceeded. [1] VCCP Read−only VCCP = 1 indicates that the VCCP high or low limit has been exceeded. This bit is cleared on a read of the status register only if the error condition has subsided. [2] VCC Read−only VCC = 1 indicates that the VCC high or low limit has been exceeded. This bit is cleared on a read of the status register only if the error condition has subsided. [3] +5 VIN Read−only +5 VIN = 1 indicates that the 5 VIN high or low limit has been exceeded. This bit is cleared on a read of the status register only if the error condition has subsided. [4] R1T Read−only R1T = 1 indicates that the Remote 1 low or high temperature has been exceeded. This bit is cleared on a read of the status register only if the error condition has subsided. [5] LT Read−only LT = 1 indicates that the local low or high temperature has been exceeded. This bit is cleared on a read of the status register only if the error condition has subsided. [6] R2T Read−only R2T = 1 indicates that the Remote 2 low or high temperature has been exceeded. This bit is cleared on a read of the status register only if the error condition has subsided. [7] OOL Read−only OOL = 1 indicates that an out−of−limit event has been latched in Interrupt Status Register 2 (0x42). This bit is a logical OR of all status bits in Interrupt Status Register 2. Software can test this bit in isolation to determine whether any of the voltage, temperature, or fan speed readings represented by Interrupt Status Register 2 are out−of−limit, which eliminates the need to read Interrupt Status Register 2 during every interrupt or polling cycle. Table 40. Register 0x42 — Interrupt Status Register 2 (Power−On Default = 0x00) Bit No. Mnemonic R/W Description [0] +12 VIN Read−only +12 VIN = 1 indicates that the 12 VIN high or low limit has been exceeded. This bit is cleared on a read of the status register only if the error condition has subsided. [1] OOL Read−only OOL = 1 indicates that an out−of−limit event has been latched in Interrupt Status Register 3 (0x43). This bit is a logical OR of all status bits in Interrupt Status Register 3. Software can test this bit in isolation to determine whether any of the voltage, temperature, or fan speed readings represented by Interrupt Status Register 3 are out−of−limit, which eliminates the need to read Interrupt Status Register 3 during every interrupt or polling cycle. [2] FAN1 Read−only FAN1 = 1 indicates that Fan 1 has dropped below minimum speed or has stalled. This bit is not set when the PWM1 output is off. [3] FAN2 Read−only FAN2 = 1 indicates that Fan 2 has dropped below minimum speed or has stalled. This bit is not set when the PWM2 output is off. [4] FAN3 Read−only FAN3 = 1 indicates that Fan 3 has dropped below minimum speed or has stalled. This bit is not set when the PWM3 output is off. [5] FAN4/ THERM Read−only When Pin 14 is programmed as a TACH4 input, FAN4 = 1 indicates that Fan 4 has dropped below minimum speed or has stalled. This bit is not set when the PWM3 output is off. If Pin 14 is configured as the THERM timer input for THERM monitoring, this bit is set when the THERM assertion time exceeds the limit programmed in the THERM timer limit register (Register 0x7A). [6] D1 FAULT Read−only D1 FAULT = 1 indicates either an open or short circuit on the Thermal Diode 1 inputs. [7] D2 FAULT Read−only D2 FAULT = 1 indicates either an open or short circuit on the Thermal Diode 2 inputs. |
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