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1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
PRELIMINARY
XRT79L71
REV. P1.0.3
347
0
Regenerate HEC Byte
Enable
R/W
Regenerate HEC Byte Enable:
This READ/WRITE bit-field permits the user to configure the Trans-
mit ATM Cell Processor block to automatically re-compute and insert
a new HEC byte into each ATM cell (that it receives from the Trans-
mit UTOPIA Interface block) that contains an uncorrectable HEC
byte.
0 - Does not configure the Transmit ATM Cell Processor block to
compute and insert a new HEC byte into ATM cells that contains an
"uncorrectable" HEC Byte error.
1 - Configures the Transmit ATM Cell Processor block to compute
and insert a new HEC byte into ATM cells that contains an "uncor-
rectable" HEC Byte error.
TRANSMIT ATM CELL PROCESSOR BLOCK - TRANSMIT ATM CONTROL - BYTE 0 (ADDRESS =
0X1F03)
B
IT
7
B
IT
6
B
IT
5
B
IT
4
B
IT
3
B
IT
2
B
IT
1
B
IT
0
HEC Byte
Invert
HEC Byte
Check Enable
Transmit
UTOPIA
Parity Check
Enable
Transmit
UTOPIA
Parity Error -
Discard
Transmit
UTOPIA -
ODD Parity
Reserved
Scrambler
Enable
R/W
R/W
R/W
R/W
R/W
R/O
R/O
R/W
0
0
0
0
0
0
0
0
B
IT
N
UMBER
N
AME
T
YPE
D
ESCRIPTION
7
HEC Byte Invert
R/W
HEC Byte Invert:
This READ/WRITE bit-field permits the user to configure the Trans-
mit ATM Cell Processor block to invert each bit within the newly com-
puted HEC byte of each outbound ATM cell.
0 - Configures the Transmit ATM Cell Processor block to NOT invert
the HEC byte values that it inserts into the fifth octet position within
each outbound ATM cell.
1 - Configures the Transmit ATM Cell Processor block to invert each
bit-field within the newly computed HEC, prior to inserting it into the
fifth octet position, within each outbound ATM cell.
6
HEC Byte Check Enable
R/W
HEC Byte Check Enable:
This READ/WRITE bit-field permits the user to configure the Trans-
mit ATM Cell Processor block to perform HEC byte checking of all
ATM cells that it receives via the Transmit UTOPIA Interface block.
0 - Configures the Transmit ATM Cell Processor block to NOT per-
form HEC byte checking on all ATM cells that it receives via the
Transmit UTOPIA Interface block.
1 - Configures the Transmit ATM Cell Processor block to perform
HEC byte checking on all ATM cells that it receives via the Transmit
UTOPIA Interface block.
B
IT
N
UMBER
N
AME
T
YPE
D
ESCRIPTION