XRT79L71 Datasheet, PDF (221/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

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PRELIMINARY
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
TXE3 BIP-4 MASK REGISTER - G.751 (DIRECT ADDRESS = 0X114A)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
Unused
TxBIP-4_Mask[3:0]
R/O
R/O
R/O
R/O
R/W
R/W
R/W
0
0
0
0
0
0
0
XRT79L71
REV. P1.0.3
BIT 0
R/W
0
BIT NUMBER
NAME
7-4
Unused
3-0
TxBIP-4_Mask_[3:0]
TYPE
R/O
R/W
DESCRIPTION
TxBIP-4 Error Mask[3:0]:
These READ/WRITE bit-fields permit the user to insert bit errors
into the BIP-4 bits, within the outbound E3 data stream.
The Frame Generator will perform an XOR operation with the
contents of the BIP-4 bits, and this register. The results of this
calculation will be inserted into the BIP-4 bit positions within the
"outbound" E3 data stream. For each bit-field (within this regis-
ter) that is set to "1", the corresponding bit, within the BIP-4 will
be in error.
NOTE: For normal operation, the user should set this register to
0x00.
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