XRT72L71 Datasheet, PDF (90/102 Pages) Exar Corporation – DS3 ATM UNI/CLEAR CHANNEL FRAMER

XRT72L71
DS3 ATM UNI/CLEAR CHANNEL FRAMER
REV. 1.1.0
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REGISTER 97
BIT
FUNCTION
7 Send OAM
6 Tx CRC10 Enable
5-0 Unused
TYPE
Sem
R/W
RO
TABLE 98: TX CP OAM REGISTER
TX CP OAM REGISTER
HEX ADDRESS: 0X61
DEFAULT
DESCRIPTION-OPERATION
A “0” to “1” transitions configures the Transmit Cell Processor to transmit an
OAM cell.
0
NOTE: This bit-field is only active if the XRT72L71 is configured to operate
in the “ATM UNI” Mode.
0: OAM Cell CRC-10 Calculation and Insertion are disabled.
1: OAM Cell CRC-10 Calculation and Insertion is enabled. The Transmit
Cell Processor will compute and insert the CRC-10 value within each “out-
0
bound” OAM cell.
NOTE: This bit-field is only active if the XRT72L71 is configured to operate
in the “ATM UNI” Mode.
0x00
REGISTER 98
BIT
FUNCTION
7-0 HEC Error Mask
TABLE 99: TX CP HEC ERROR MASK REGISTER
TX CP HEC ERROR MASK REGISTER
HEX ADDRESS: 0X62
TYPE
DEFAULT
DESCRIPTION-OPERATION
The Transmit Cell Processor block always XORs contents of this register with
the contents of the HEC byte (within each “outbound” ATM cell). This
“XORed” value is then written back into the “HEC” byte field, within each
R/W
0x00
“outbound” ATM cell; prior to transmission. Setting any of these bit-fields to
“1” introduces error in that specific bit, within each “outbound” HEC byte.
Register must be set to 0x00 for normal operation,
NOTE: This bit-field is only active if the XRT72L71 is configured to operate
in the “ATM UNI” Mode.
REGISTER 99
BIT
FUNCTION
TYPE
TABLE 100: FUTURE USE
FUTURE USE
HEX ADDRESS: 0X63
DEFAULT
DESCRIPTION-OPERATION
REGISTER 100
BIT
FUNCTION
7-0 Tx Idle Cell Pattern 1
TABLE 101: TX CP IDLE CELL PATTERN HEADER BYTE-1
TX CP IDLE CELL PATTERN HEADER BYTE-1
HEX ADDRESS: 0X64
TYPE
R/W
DEFAULT
DESCRIPTION-OPERATION
0x00
Contains pattern for the first header byte of each “outbound” idle cell.
Register is set to 0x00 when transmitting standard idle cell pattern.
NOTE: This bit-field is only active if the XRT72L71 is configured to operate
in the “ATM UNI” Mode.
86