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KTD-N0876-0
to the operating system does so anytime SERR# is sampled asserted.
INTERRUPT PINS (OPTIONAL).
Interrupts
on
PCI
are
(negative true), using open drain output drivers. The assertion and deassertion of
INTx#
is
asynchronous
attention from its device driver. Once the INTx# signal is asserted, it remains
asserted until the device driver clears the pending request. When the request is
cleared, the device deasserts its INTx# signal. PCI defines one interrupt line for a
single function device and up to four interrupt lines for a multi-function device or
connector. For a single function device, only INTA# may be used while the other three
interrupt lines have no meaning.
Interrupt A is used to request an interrupt.
INTA#
Interrupt B is used to request an interrupt and only has meaning on a
INTB#
multi-function device.
Interrupt C is used to request an interrupt and only has meaning on a
INTC#
multi-function device.
Interrupt D is used to request an interrupt and only has meaning on a
INTD#
multi-function device.
Page 56
optional
and
defined
to
CLK.
A
device
asserts
KTA75/Flex Users Guide
KTA75/Flex Users Guide
Connector Signal Definition
as
"level
sensitive,"
its
INTx#
line
asserted
low
when
requesting
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