Programming 45
The
PCI
Interrupt
Enable
(Bit
8)
functions
as
a
global
PCI
interrupt
enable.
It
must
be
set
high
(1)
in
addition
to
other
enable
bits
before
any
primary
or
secondary
tier
interrupt
source
will
result
in
a
PCI
interrupt.
summarizes
the
INTCSR
Interrupt
Enables
that
pertain
to
RFM
‐
5565
operation.
summarizes
the
INTCSR
Interrupt
Status
bits
that
pertain
to
RFM
‐
5565
operation.
Table 3-38 Interrupt Control and Status Register
INTCSR: BAR0/1 Offset $68
Bit
Description
Read
Write
Value after
PCI Reset
7:0
Reserved
Yes
No
$00
8
PCI Interrupt Enable
. Writing a one (1) enables PCI interrupts.
Yes
Yes
1
10:9
Reserved
Yes
No
0
11
Local Interrupt Input Enable.
Writing a one (1) enables a local interrupt (i.e., RFM interrupts) to
assert a host Interrupt.
Yes
Yes
0
14:12
Reserved
Yes
No
0
15
Local Interrupt Input Active
.
When set to a one (1), indicates the Local interrupt input is active.
Yes
No
0
16
Reserved
Yes
No
1
17
Reserved
Yes
No
0
18
Local DMA Channel 0 Interrupt Enable.
Writing a one (1) enables DMA Channel 0 interrupts.
Clearing the DMA status bit also clears the interrupt.
Yes
Yes
0
20:19
Reserved
Yes
No
0
21
DMA Channel 0 Interrupt Active.
Reading a one (1) indicates the DMA Channel 0 interrupt is active.
Yes
No
0
23:22
Reserved
Yes
No
$0
27:24
Reserved
Yes
No
$f
31:28
Reserved
Yes
No
$0
Table 3-39 INTCSR Interrupt Enables
Enable the interrupt source:
Set the following Bit high (1):
Global PCI interrupt enable for all sources
8
Any second tier int. through Local Int. Input (LINTi#) 11
Local DMA Channel 0 interrupt
18
Table 3-40 INTCSR Interrupt Status
To check the assertion of the following interrupt source:
Check for a high (1) at Bit:
Any second tier int. through Local Int. Input (LINTi#)
15
Local DMA Channel 0 interrupt
21