PCI-SIO4 User Manual
General Standards Corporation
8302A Whitesburg Drive Huntsville, AL 35802, Phone: (256) 880-8787
36
001
1 Bit
010
2 Bits
011
3 Bits
100
4 Bits
101
5 Bits
110
6 Bits
111
7 Bits
D5
RW
Tx Parity Enable
D6..7
Tx Parity Sense (encoded as follows):
00
Even
01
Odd
10
Space
11
Mark
2.3.25.2
High: (LOC 0xn33)
D0
RW
Tx CRC EOF/EOM
D1
RW
Tx CRC Enable
D2
RW
Tx CRC on Preset Value
D3..4
Polynomial Tx CRC (encoded as follows):
00
CRC-CCITT
01
CRC-16
10
CRC-32
11
Reserved
D5..7
Tx Data Encoding (encoded as follows):
000
NRZ
001
NRZB
010
NRZI-Mark
011
NRZI-Space
100
Biphase-Mark
101
Biphase-Space
110
Biphase-Level
111
Diff. Biphase-Level
2.3.26
T
RANSMIT
C
OMMAND
/S
TATUS
R
EGISTER
(TCSR)
2.3.26.1
Low: (LOC 0xn34)
D0
RO
Tx Buffer Empty
D1
RW
Tx Underrun
D2
RO
All Sent
D3
RW
Tx CRC Sent
D4
RW
Tx EOF/EOT Sent
D5
RW
Tx Abort Sent
D6
RW
Tx Idle Sent
D7
RW
Tx Preamble Sent
2.3.26.2
High: (LOC 0xn35)
D0..2
Tx Idle Line Condition
000
SYNC/Flag/Normal
001
Alternating 1 & 0