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77
DMx820 User’s Manual
9
PCI Doorbell Interrupt Enable.
Writing 1
enables Local-to-PCI Doorbell interrupts. Used in
conjunction with the PCI Interrupt Enable bit
(INTCSR[8]). Clearing the L2PDBELL register
bits that caused the interrupt also clears the
interrupt.
Yes
Yes
0
0
10
PCI Abort Interrupt Enable.
Value of 1 enables
a Master Abort or Master detection of a Target
Abort to assert a PCI interrupt (INTA#). Used in
conjunction with the PCI Interrupt Enable bit
(INTCSR[8]). Clearing the Received Master and
Target Abort bits (PCISR[13:12]) also clears the
PCI interrupt.
Yes
Yes
0
0
11
Local Interrupt Input Enable.
Writing 1 enables
a Local interrupt input (LINTi#) assertion to
assert a PCI interrupt (INTA#). Used in
conjunction with the PCI Interrupt Enable bit
(INTCSR[8]). De-asserting LINTi# also clears the
interrupt.
Yes
Yes
0
0
12
Retry Abort Enable.
Writing 1 enables the PCI
9056 to treat 256 consecutive Master Retries to a
Target as a Target Abort. Writing 0 enables the
PCI 9056 to attempt Master Retries indefinitely.
Yes
Yes
0
0
13
PCI Doorbell Interrupt Active.
When set to 1,
indicates the PCI Doorbell interrupt is active.
Yes
No
0
0
14
PCI Abort Interrupt Active.
When set to 1,
indicates the PCI Master or Target Abort interrupt
is active.
Yes
No
0
0
15
Local Interrupt Input Active.
When set to 1,
indicates the Local interrupt input (LINTi#) is
active.
Yes
No
0
0
16
Local Interrupt Output Enable.
Writing 1
enables Local interrupt output (LINTo#).
Yes
Yes
1
1
17
Local Doorbell Interrupt Enable.
Writing 1
enables PCI-to-Local Doorbell interrupts. Used in
conjunction with the Local Interrupt Output
Enable bit (INTCSR[16]). Clearing the
P2LDBELL register bits that caused the interrupt
also clears the interrupt.
Yes
Yes
0
0
18
DMA Channel 0 Interrupt Enable.
Writing 1
enables DMA Channel 0 interrupts. Used in
conjunction with the DMA Channel 0 Interrupt
Select bit (DMAMODE0[17]). Setting the DMA
Channel 0 Clear Interrupt bit (DMACSR0[3]=1)
also clears the interrupt.
Yes
Yes
0
0/1
19
DMA Channel 1 Interrupt Enable.
Writing 1
enables DMA Channel 1 interrupts. Used in
conjunction with the DMA Channel 1 Interrupt
Select bit (DMAMODE1[17]). Setting the DMA
Channel 1 Clear Interrupt bit (DMACSR1[3]=1)
also clears the interrupt.
Yes
Yes
0
0/1
20
Local Doorbell Interrupt Active.
Reading 1
indicates the Local Doorbell interrupt is active.
Yes
No
0
0
21
DMA Channel 0 Interrupt Active.
Reading 1
indicates the DMA Channel 0 interrupt is active.
Yes
No
0
0
22
DMA Channel 1 Interrupt Active.
Reading 1
indicates the DMA Channel 1 interrupt is active.
Yes
No
0
0
23
Built-In Self-Test (BIST) Interrupt Active.
Reading 1 indicates the BIST interrupt is active.
The BIST interrupt is enabled by writing 1 to the
PCI Built-In Self-Test Interrupt Enable bit
(PCIBISTR[6]=1). Clearing the Enable bit
(PCIBISTR[6]=0) also clears the interrupt. Note:
Refer to the PCIBISTR register for a description
of the self-test.
Yes
No
0
0