5136-DNP-PCI
Hardware Reference
© 1999 SST/Woodhead Canada Limited
11
Bit Name
Description
IrqPending
(IRQ)
This bit indicates that an interrupt from the card is still pending.
•
Writing 1 acknowledges the interrupt (and clears this condition)
•
Writing 0 has no effect
•
Reading 1 indicates interrupt in progress.
•
Reading 0 indicates interrupt complete.
IntEn
(IRQE)
•
Writing 1 enables PCI interrupts
•
Writing 0 disables PCI interrupts (the IrqPending flag still functions as
described)
Bank
The 5136-DNP-PCI has 256k of memory accessible to the host. These bits select
which bank of memory the host can access.
•
In 16K mode the bank number may be 0 through 7.
•
In 32K mode the bank number may be 0 through 7.
Note A: This means that in 16K mode, only one half of the card’s memory is
accessible. See the Memory Bank Selection table in section 4.2.5.
Note B: It is not necessary to use Memory Banks with the 5136-DNP-PCI as the
entire 256k can be linearly accessed. Banks are supported though for backward
compatibility. See section 4.2.5.
MemEn
(MEN)
These bits indicate and control whether or not the card’s shared memory will
respond to host memory accesses. This may be used to multiplex several
5136-DNP cards at the same base address by enabling the memory on one card at
a time.
•
Writing 0 Disables card memory
•
Writing 1 Enables card memory
4.3.2 Loader/Memory Configuration Register - BCR1 - Base A 1
Bit
7
6
5
4
3
2
1
0
Read/Write
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
Name
Win16K
Reserved
Reserved
Reserved
Bit Name
Description
Reserved
Bits 0-4 are are read/write for backward compatibility but perform no function. Bit 5
is read only, bit 6 is read/write for compatibility.
Win32K
This bit controls and indicates the Memory Bank Size
•
0 indicates a 32K bank size
•
1 indicates a 16K bank size
4.3.3 Loader/Memory Configuration Register - BCR2 - Base A 2
Bit
7
6
5
4
3
2
1
0
Read/Write
R/W
R/W
R
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
Name
CardRun
WDInh
HealthGrn
Mode
Reserved
Bit Name
Description
Reserved
These bits are Read/Write for backward compatibility, but perform no function on the
5136-DNP-PCI.
Mode
This bit controls and indicates the current mode of operation.
•
When this bit is 1, the Pro Mode register set is selected
•
When this bit is 0, the Compatibility Mode register set is selected.
StockCheck.com
