lan9313 Standard Microsystems Corp., lan9313 Datasheet - Page 151
lan9313
Manufacturer Part Number
lan9313
Description
Lan9313/lan9313i Three Port 10/100 Managed Ethernet Switch With Mii
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9313.pdf
(398 pages)
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Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
SMSC LAN9313/LAN9313i
13.1.1
13.1.1.1
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.
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 LAN9313/LAN9313i interrupt sources. For more
information on the LAN9313/LAN9313i 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
151
Size:
Chapter 5, "System Interrupts," on page
32 bits
TYPE
R/W
R/W
R/W
RO
RO
RO
RO
RO
SC
SC
Revision 1.2 (04-08-08)
DEFAULT
00h
0h
0b
0b
0b
-
-
-
52.
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