LAN9311-NZW Standard Microsystems (SMSC), LAN9311-NZW Datasheet - Page 173

• Manufacturer Part Number: LAN9311-NZW
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN9311-NZW

• Number Of Primary Switch Ports: 2
• Internal Memory Buffer Size: 32
• Operating Supply Voltage (typ): 3.3V
• Fiber Support: No
• Integrated Led Drivers: Yes
• 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

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9311/LAN9311i
14.2.1
14.2.1.1
31:24
23:15
BITS
11:9
7:5
14
13
12
8
Interrupt De-assertion Interval (INT_DEAS)
This field determines the Interrupt Request De-assertion Interval in multiples
of 10 microseconds.
Setting this field to zero causes the device to disable the INT_DEAS Interval,
reset the interval counter and issue any pending interrupts. If a new, non-
zero value is written to this field, any subsequent interrupts will obey the new
setting.
This field does not apply to the PME_INT interrupt.
RESERVED
Interrupt De-assertion Interval Clear (INT_DEAS_CLR)
Writing a 1 to this register clears the de-assertion counter in the Interrupt
Controller, thus causing a new de-assertion interval to begin (regardless of
whether or not the Interrupt Controller is currently in an active de-assertion
interval).
0: Normal operation
1: Clear de-assertion counter
Interrupt De-assertion Status (INT_DEAS_STS)
When set, this bit indicates that interrupts are currently in a de-assertion
interval, and will not be sent to the IRQ pin. When this bit is clear, interrupts
are not currently in a de-assertion interval, and will be sent to the IRQ pin.
0: No interrupts in de-assertion interval
1: Interrupts in de-assertion interval
Master Interrupt (IRQ_INT)
This read-only bit indicates the state of the internal IRQ line, regardless of
the setting of the IRQ_EN bit, or the state of the interrupt de-assertion
function. When this bit is set, one of the enabled interrupts is currently
active.
0: No enabled interrupts active
1: One or more enabled interrupts active
RESERVED
IRQ Enable (IRQ_EN)
This bit controls the final interrupt output to the IRQ pin. When clear, the IRQ
output is disabled and permanently de-asserted. This bit has no effect on
any internal interrupt status bits.
0: Disable output on IRQ pin
1: Enable output on IRQ pin
RESERVED
Interrupts
This section details the interrupt related System CSR’s. These registers control, configure, and monitor
the IRQ interrupt output pin and the various LAN9311/LAN9311i interrupt sources. For more
information on the LAN9311/LAN9311i interrupts, refer to
Interrupt Configuration Register (IRQ_CFG)
This read/write register configures and indicates the state of the IRQ signal.
Offset:
054h
DESCRIPTION
DATASHEET
173
Size:
Chapter 5, "System Interrupts," on page
32 bits
TYPE
R/W
R/W
R/W
RO
RO
RO
RO
RO
SC
SC
Revision 1.7 (06-29-10)
DEFAULT
00h
0h
0b
0b
0b
-
-
-
49.