PCI-SIO4 User Manual
General Standards Corporation
8302A Whitesburg Drive Huntsville, AL 35802, Phone: (256) 880-8787
10
2.1
BIT MAP FOR LOCAL SPACE REGISTERS
When writing to the registers all reserved bits should be set to
0
for future compatibility. Also, the value
read from a reserved bit will be indeterminate.
2.1.0
F
IRMWARE
R
EVISION
:
(
LOC
0
X
00)
D0..31
0x00000000
Original Revision
2.1.1
B
OARD
C
ONTROL
:
(
LOC
0
X
04)
D2:
0
D
EMAND
M
ODE
DMA
C
HANNEL
0
R
EQUEST
E
NCODER
2 1 0
0 0 0
Request DMA on Serial Channel 1 Rx FIFO Almost Full - Hold until Serial Channel 1 Rx FIFO
Almo st Empty
1 0 0
Request DMA on Serial Channel 1 Tx FIFO Almost Empty - Hold until Serial Channel 1 Tx FIFO
Almost Full
0 1 0
Request DMA on Serial Channel 2 Rx FIFO Almost Full - Hold until Serial Channel 2 Rx FIFO
Almost Empty
1 1 0
Request DMA on Serial Channel 2 Tx FIFO Almost Empty - Hold until Serial Channel 2 Tx FIFO
Almost Full
0 0 1
Request DMA on Serial Channel 3 Rx FIFO Almost Full - Hold until Serial Channel 3 Rx FIFO
Almost Empty
1 0 1
Request DMA on Serial Channel 3 Tx FIFO Almo st Empty - Hold until Serial Channel 3 Rx FIFO
Almost Empty
0 1 1
Request DMA on Serial Channel 4 Rx FIFO Almost Full - Hold until Serial Channel 4 Rx FIFO
Almost Empty
1 1 1
Request DMA on Serial Channel 4 Tx FIFO Almost Empty - Hold until Serial Channel 4 Rx FIFO
Almost Empty
D3
Reserved
D4:6
Demand Mode DMA Channel Request Encoder
6 5 4
0 0 0
Request DMA on Serial Channel 1 Rx FIFO Almost Full - Hold until Serial Channel 1 Rx FIFO
Almost Empty
1 0 0
Request DMA on Serial Channel 1 Tx FIFO Almost Empty - Hold until Serial Channel 1 Tx FIFO
Almost Full
0 1 0
Request DMA on Serial Channel 2 Rx FIFO Almost Full - Hold until Serial Channel 2 Rx FIFO
Almost Empty
1 1 0
Request DMA on Serial Channel 2 Tx FIFO Almost Empty - Hold until Serial Channel 2 Tx FIFO
Almost Full
0 0 1
Request DMA on Serial Channel 3 Rx FIFO Almost Full - Hold until Serial Channel 3 Rx FIFO
Almost Empty
1 0 1
Request DMA on Serial Channel 3 Tx FIFO Almost Empty - Hold until Serial Channel 3 Rx FIFO
Almost Empty