LAN9312-NU Standard Microsystems (SMSC), LAN9312-NU Datasheet - Page 52

• Manufacturer Part Number: LAN9312-NU
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN9312-NU

• Number Of Primary Switch Ports: 2
• Operating Supply Voltage (typ): 3.3V
• Fiber Support: No
• Phy/transceiver Interface: MII
• Power Supply Type: Analog
• Data Rate (typ): 10/100Mbps
• Vlan Support: Yes
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 128
• Mounting: Surface Mount
• Jtag Support: No
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Operating Temperature Classification: Commercial
• Data Rate: 100Mbps
• Lead Free Status / RoHS Status: Compliant

Revision 1.7 (06-29-10)
5.2.3
5.2.4
5.2.5
Ethernet PHY Interrupts
The Port 1 and Port 2 PHYs each provide a set of identical interrupt sources. The top-level PHY_INT1
(bit 26) and PHY_INT2 (bit 27) of the
P H Y i n t e r r u p t e v e n t o c c u r r e d i n t h e
(PHY_INTERRUPT_SOURCE_x).
Port 1 and Port 2 PHY interrupts are enabled/disabled via their respective
Register
via the
Port 2 PHYs are each capable of generating unique interrupts based on the following events:
In order for a Port 1 or Port 2 interrupt event to trigger the external IRQ interrupt pin, the desired PHY
interrupt event must be enabled in the corresponding
(PHY_INTERRUPT_MASK_x), the PHY_INT1(Port 1 PHY) and/or PHY_INT2(Port 2 PHY) bits of the
Interrupt Enable Register (INT_EN)
of the
For additional details on the Ethernet PHY interrupts, refer to
page
GPIO Interrupts
Each GPIO[11:0] of the LAN9312 is provided with its own interrupt. The top-level GPIO (bit 12) of the
Interrupt Status Register (INT_STS)
General Purpose I/O Interrupt Status and Enable Register
Purpose I/O Interrupt Status and Enable Register (GPIO_INT_STS_EN)
and status of each GPIO[11:0] interrupt.
In order for a GPIO interrupt event to trigger the external IRQ interrupt pin, the desired GPIO interrupt
must be enabled in the
(GPIO_INT_STS_EN), bit 12 (GPIO_EN) of the
IRQ output must be enabled via bit 8 (IRQ_EN) of the
For additional details on the GPIO interrupts, refer to
Host MAC Interrupts
The top-level
status and enabling/disabling of multiple Host MAC related interrupts. All Host MAC interrupts are
monitored and configured directly within these two registers. The following Host MAC related interrupt
events are supported:
ENERGYON Activated
Auto-Negotiation Complete
Remote Fault Detected
Link Down (Link Status Negated)
Auto-Negotiation LP Acknowledge
Parallel Detection Fault
Auto-Negotiation Page Received
TX Stopped
RX Stopped
RX Dropped Frame Counter Halfway
TX IOC
RX DMA
94.
Interrupt Configuration Register
Port x PHY Interrupt Source Flags Register
(PHY_INTERRUPT_MASK_x). The source of a PHY interrupt can be determined and cleared
Interrupt Status Register
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
General Purpose I/O Interrupt Stat us and Enable Regist er
DATASHEET
must be set, and IRQ output must be enabled via bit 8 (IRQ_EN)
provides indication that a GPIO interrupt event occurred in the
(INT_STS), and
(IRQ_CFG).
Interrupt Status Register (INT_STS)
52
P o r t x P H Y I n t e r r u p t S o u r c e F l a g s R e g i s t e r
Interrupt Enable Register (INT_EN)
(PHY_INTERRUPT_SOURCE_x). The Port 1 and
Section 13.2.2, "GPIO Interrupts," on page
Interrupt Enable Register (INT_EN)
Interrupt Configuration Register
Port x PHY Interrupt Mask Register
(GPIO_INT_STS_EN). The
Section 7.2.8.1, "PHY Interrupts," on
provides enabling/disabling
Port x PHY Interrupt Mask
provides indication that a
must be set, and
SMSC LAN9312
(IRQ_CFG).
provide the
Datasheet
General
163.