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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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ADT7467ARQZ-R7 Datenblatt(PDF) 66 Page - ON Semiconductor |
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ADT7467ARQZ-R7 Datenblatt(HTML) 66 Page - ON Semiconductor |
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66 / 77 page  ADT7467 Rev. 3 | Page 66 of 77 | www.onsemi.com Table 28. Register 0x42—Interrupt Status Register 2 (Power-On Default = 0x00) Bit Name R/W Description <1> OVT Read only OVT = 1 indicates that one of the THERM overtemperature limits has been exceeded. This bit is cleared upon a read of the status register when the temperature drops below THERM – THYST. <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> F4P Read only F4P = 1 indicates that Fan 4 has dropped below minimum speed or has stalled. This bit is not set when the PWM3 output is off. Read/write When Pin 9 is programmed as a GPIO output, writing to this bit determines the logic output of the GPIO. Read only If Pin 9 is configured as the THERM timer input for THERM monitoring, then this bit is set when the THERM assertion time exceeds the limit programmed in the THERM limit register (0x7A). <6> D1 Read only D1 = 1 indicates either an open or short circuit on the Thermal Diode 1 inputs. <7> D2 Read only D2 = 1 indicates either an open or short circuit on the Thermal Diode 2 inputs. Table 29. Voltage Limit Registers1 Register Address R/W Description2 Power-On Default 0x46 Read/write VCCP low limit. 0x00 0x47 Read/write VCCP high limit. 0xFF 0x48 Read/write VCC low limit. 0x00 0x49 Read/write VCC high limit. 0xFF 1 Setting the Configuration Register 1 LOCK bit has no effect on these registers. 2 High limit: An interrupt is generated when a value exceeds its high limit (>comparison). Low limit: An interrupt is generated when a value is equal to or below its low limit (≤comparison). Table 30. Temperature Limit Registers1 Register Address R/W Description2 Power-On Default 0x4E Read/write Remote 1 temperature low limit. 0x01 0x4F Read/write Remote 1 temperature high limit. 0x7F 0x50 Read/write Local temperature low limit. 0x01 0x51 Read/write Local temperature high limit. 0x7F 0x52 Read/write Remote 2 temperature low limit. 0x01 0x53 Read/write Remote 2 temperature high limit. 0x7F 1 Exceeding any temperature limit by 1°C sets the appropriate status bit in the interrupt status register. Setting the Configuration Register 1 LOCK bit has no effect on these registers. 2 High limit: An interrupt is generated when a value exceeds its high limit (>comparison). Low limit: An interrupt is generated when a value is equal to or below its low limit (≤comparison). Table 31. Fan Tachometer Limit Registers1 Register Address R/W Description Power-On Default 0x54 Read/write TACH1 minimum low byte. 0xFF 0x55 Read/write TACH1 minimum high byte/single-channel ADC channel select. 0xFF 0x56 Read/write TACH2 minimum low byte. 0xFF 0x57 Read/write TACH2 minimum high byte. 0xFF 0x58 Read/write TACH3 minimum low byte. 0xFF 0x59 Read/write TACH3 minimum high byte. 0xFF 0x5A Read/write TACH4 minimum low byte. 0xFF 0x5B Read/write TACH4 minimum high byte. 0xFF 1 Exceeding any TACH limit register by 1 indicates that the fan is running too slowly or has stalled. The appropriate status bit is set in Interrupt Status Register 2 to indicate the fan failure. Setting the Configuration Register 1 LOCK bit has no effect on these registers. |
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