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LAN8818D/KDX Datasheet(PDF) 60 Page - Microchip Technology |
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LAN8818D/KDX Datasheet(HTML) 60 Page - Microchip Technology |
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60 / 101 page  LAN8818D DS00005832C-page 60 © 2026 Microchip Technology Inc. and its subsidiaries 5.17 Interrupts The INT_N pin is an optional interrupt signal that is used to inform the external controller that there has been a status update in the device. The Interrupt Enable register contains the interrupt control bits that enable and disable the condi- tions for asserting the INT_N signal. The Interrupt Status register contains the interrupt status bits that indicate which interrupt conditions have occurred. Most interrupt status bits are cleared upon reading. Some bits are read only and have a lower level register to indicate individual sources. The interrupt structure of the device is detailed in Figure 5-14. The INT_N buffer type is selectable between open-drain and push-pull and is configured by the INT Buffer Type field in the Output Control register. The default is open-drain. The Intr Polarity Invert bit in the Control register sets the interrupt level to active high or active low. The default is active low. If the buffer type is set to open-drain, the polarity is forced to be active low. Note: Bits in the Interrupt Status register are set by the interrupt events regardless of the value of the correspond- ing bits in the Interrupt Enable register. FIGURE 5-14: INTERRUPT STRUCTURE 4 4 Interrupt Sources Logical OR 1588_TSU_x Interrupt 1588 Timestamp Engine x INT_N Chip-Level Interrupt Chip-Level Interrupt Status Register GPHY_Hard_Macro_x Interrupt 1588 Common Logic Interrupt 1588 Interrupt Enable Register Logical OR GPHY Hard Macro x GPHY Interrupt Enable Register Logical OR PTP Common Interrupt Enable Register 4 4 GPIOs Interrupt Logical OR GPIO Interrupt Enable Register AB PVT Interrupt Logical OR AB PVT Interrupt Mask Register 1588 ISR Interrupt Sources GPHY ISR Interrupt Sources PTP Common ISR Interrupt Sources GPIO ISR Interrupt Sources AB PVT ISR 1588 Common Logic GPIOs Temperature Monitor |
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