Registers
PCVisionplus
Hardware Reference
3–21
Rev 02; February 8, 2002
3.2.5 Bus Master Host Control/Status (BMCTL) R/W
0
7
BADR0 + 0x3C
BMDONE
Reserved
FIFOEM
FIFO4P
FIFOFL
Reserved
Reserved
Reserved
8
15
0
0
0
0
0
0
0
1
BMCTL
16
23
0
0
0
0
0
0
0
0
24
31
0
0
0
0
0
0
0
RST
Always program bits defined as zero or one to their respective values. Reserved bits are “don’t care” unless other-
wise defined.
Bit
Mnemonic
Function
0–2
Reserved
“Don’t Care”
3
FIFOFL
FIFO Full
4
FIFO4P
FIFO 4 Plus
5
FIFOEM
FIFO Empty
6
Reserved
“Don’t Care”
7
BMDONE
Bus Master Transfer Done
8
Reserved
Must be one
9–23
Reserved
Must be zero
24
RST
Software Reset
25–31
Reserved
Must be zero
3.2.5.1 FIFO Full (FIFOFL) R-O
This bit is set to one when the FIFO becomes full during a bus master transfer from the PCVisionplus to the PCI-bus.
FIFO Full indicates 8 DWORDs of the bus master transfer are in the FIFO waiting to be written to the destination
address of the transfer. This bit is read only.
FIFOFL
Status
0
FIFO is not full
1
FIFO is full
3.2.5.2 FIFO 4 Plus (FIFO4P) R-O
This bit is set to one when,the FIFO has four or more DWORDs ready for bus master transfer from the PCVisionplus
to the PCI bus. This bit is read only.
FIFO4P
Status
0
FIFO as less than 4 DWORDs
1
FIFO has more than 4 DWORDs
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