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ADM1029 Datasheet(PDF) 45 Page - Analog Devices |
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ADM1029 Datasheet(HTML) 45 Page - Analog Devices |
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45 / 48 page  REV. 0 ADM1029 –45– Register 28h, 29h, 2Ah, 2Bh, 2Ch, 2Dh, 2Eh – GPIOx * Behavior (Power-On Default 00h) Bit Name R/W Description 0 Direction = 0 R/W This bit indicates the direction for GPIOx * pin. When set to 1 GPIOx* will function as an input, when 0 GPIOx * will function as an output. 1 Polarity = 0 R/W This bit indicates the polarity of the GPIOx * pin. When set to 1 GPIOx* will be active high, when 0 GPIOx * will be active low. 2 Bit 2 = 0 R/W If GPIOx * is configured as an input, CFAULT will be asserted if GPIOx* pin is asserted while this bit is set. If GPIO2 is configured as an output, GPIO2 will be asserted if a temperature High limit is exceeded while this bit is set. If automatic fan speed control is enabled, this bit will be set by default. This can be used as a SHUTDOWN signal for a catastrophic overtemperature event. 3 Bit 3 = 0 R/W If GPIOx * is configured as an input, INT will be asserted if GPIOx* pin is asserted while this bit is set. If GPIOx * is configured as an output, GPIOx* will be asserted if a temperature Low limit is exceeded while this bit is set. 4 Bit 4 = 0 R/W If GPIOx * is configured as an input, Fans will go to Alarm Speed if GPIOx* pin is asserted while this bit is set. If GPIOx * is configured as an output, GPIOx * will be asserted if a Fan Tach limit is exceeded while this bit is set. 5 Bit 5 = 0 R/W If GPIOx * is configured as an input, Fans will go to Hot-Plug Speed if GPIOx * pin is asserted while this bit is set. If GPIOx* is configured as an output, GPIOx * will be asserted if a Fan Fault (Pins 2/23) is detected while this bit is set. 6 Bit 6 = 0 R If GPIOx * is configured as an input, this bit will reflect state of GPIOx* pin. R/W If GPIOx * is configured as an output, GPIOx will be asserted if an AIN high limit is exceeded while this bit is set. 7 Bit 7 = 0 R/W If GPIOx * is configured as an input, this bit will latch a GPIOx* assertion event. This bit is cleared by writing a 0 to it. If GPIOx * is configured as an output, GPIOx * will be asserted if an AIN Low limit is exceeded while this bit is set. *“x” denotes the number of the GPIO pin. Register 28h controls GPIO0, 29h controls GPIO1, etc. Register 38h, 39h, 3Ah, 3Bh, 3Ch, 3Dh, 3Eh – GPIOx * Event Mask (Power-On Default 00h) Bit Name R/W Description 0 Fan 1 = 0 R/W If GPIOx * is asserted such that fans should be driven at Alarm or Hot-Plug Speed, Fan 1 will be set to this speed when this bit is set. 1 Fan 2 = 0 R/W If GPIOx * is asserted such that fans should be driven at Alarm or Hot-Plug Speed, Fan 2 will be set to this speed when this bit is set. 2 Reserved R Unused. Will read back 0. 3 Reserved R Unused. Will read back 0. 4 Reserved R Unused. Will read back 0. 5 Reserved R Unused. Will read back 0. 6 Reserved R Unused. Will read back 0. 7 Reserved R Unused. Will read back 0. *“x” denotes the number of the GPIO pin. Register 38h is for GPIO0, 39h is for GPIO1 etc. |
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Similar Description - ADM1029 |
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