PCI-SIO4 User Manual
General Standards Corporation
8302A Whitesburg Drive Huntsville, AL 35802, Phone: (256) 880-8787
12
D10
Channel 3 Enable Receive Upper Clk
Writing a ‘1’ to this bit will turn on the receiver for the Channel 3 Rx clock on
the upper portion of the cable. This will cause this signal on the cable to go from
a tri-state condition to a loaded condition.
D11
Channel 3 Enable Receive Lower Clk
Writing a ‘1’ to this bit will turn on the receiver for the Channel 3 Rx clock on
the lower portion of the cable. This will cause this signal on the cable to go from
a tri-state condition to a loaded condition.
D12
Channel 4 Enable Drive Upper Clk
Writing a ‘1’ to this bit will turn on the transmitter for the Channel 4 Tx Clk on
the upper portion of the cable. This will cause this signal on the cable to go from
a tri-state condition to a driven state.
D13
Channel 4 Enable Drive Lower Clk
Writing a ‘1’ to this bit will turn on the transmitter for the Channel 4 Tx Clk on
the lower portion of the cable. This will cause this signal on the cable to go from
a tri-state condition to a driven state.
D14
Channel 4 Enable Receive Upper Clk
Writing a ‘1’ to this bit will turn on the receiver for the Channel 4 Rx clock on
the upper portion of the cable. This will cause this signal on the cable to go from
a tri-state condition to a loaded condition.
D15
Channel 4 Enable Receive Lower Clk
Writing a ‘1’ to this bit will turn on the receiver for the Channel 4 Rx clock on
the lower portion of the cable. This will cause this signal on the cable to go from
a tri-state condition to a loaded condition.
2.1.4
C
HANNEL
1
T
X
A
LMOST
:
(LOC
0
X
10)
D0..31
Channel 1 Tx Almost Data
The data in this register is used for programming the Almost Flags of the Tx
FIFOs for this channel.
D0..15
Used for the Almo st Empty Flag
D16..31
Used for the Almost Full Flag
2.1.5
C
HANNEL
1
R
X
A
LMOST
:
(LOC
0
X
14)
D0..31
Channel 1 Rx Almost Data
The data in this register is used for programming the Almost Flags of the Rx
FIFOs for this channel.
D0..15
Used for the Almost Empty Flag
D16..31
Used for the Almost Full Flag
2.1.6
C
HANNEL
1
FIFO:
(LOC
0
X
18)
D0..7
Channel 1 FIFO Data
The FIFOs are setup in a way that the Rx FIFO and the Tx FIFO are located at
the same address. A write to this address will be directed toward the Tx FIFO,
and a read from this address will be directed toward the Rx FIFO.
D8..31
Reserved
2.1.7
C
HANNEL
1
C
ONTROL
/S
TATUS
:
(LOC
0
X
1C)