LAN9311i datasheet(54/459 Pages) SMSC

Part #	LAN9311i

Description	Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

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Manufacturer	SMSC [SMSC Corporation]

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Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

Datasheet

Revision 1.6 (08-18-09)

54

SMSC LAN9311/LAN9311i

DATASHEET

5.2.8

Software Interrupt

A general purpose software interrupt is provided in the top level Interrupt Status Register (INT_STS)

and Interrupt Enable Register (INT_EN). The SW_INT interrupt (bit 31) of the Interrupt Status Register

(INT_STS) is generated when SW_INT_EN (bit 31) of the Interrupt Enable Register (INT_EN) is set.

This interrupt provides an easy way for software to generate an interrupt, and is designed for general

software usage.

5.2.9

Device Ready Interrupt

A device ready interrupt is provided in the top-level Interrupt Status Register (INT_STS) and Interrupt

Enable Register (INT_EN). The READY interrupt (bit 30) of the Interrupt Status Register (INT_STS)

indicates that the LAN9311/LAN9311i is ready to be accessed after a power-up or reset condition.

Writing a 1 to this bit in the Interrupt Status Register (INT_STS) will clear it.

In order for a device ready interrupt event to trigger the external IRQ interrupt pin, bit 30 of the Interrupt

Enable Register (INT_EN) must be set, and IRQ output must be enabled via bit 8 (IRQ_EN) of the

Interrupt Configuration Register (IRQ_CFG).

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