46 PCIE-5565RC* Ultrahigh Speed Fiber-Optic Reflective Memory with Interrupts
Publication No. 500-9300875565-000 Rev. C.0
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.
Table 3-30
on page 47 summarizes the INTCSR Interrupt Enables that pertain to
RFM-5565 operation.
7
DMA Channel 0 Big Endian Mode (Address
Invariance)
.
Writing a one (1) specifies use of Big Endian data
ordering for DMA Channel 0 accesses to the RFM
Address Space.
Writing a zero (0) specifies Little Endian ordering.
Yes
Yes
0
Table 3-29 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
(Continued)
Table 3-28 Big/Little Endian Descriptor Register (Continued)
BIGEND: BAR0/1 Offset $0C
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