XRT79L71 Datasheet, PDF (197/441 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
XRT79L71
REV. P1.0.3
BIT NUMBER
NAME
0
F Bit Mask [24]
TYPE
R/W
DESCRIPTION
Transmit F-Bit Error - Bit 25:
This READ/WRITE bit-field permits the user to configure the
Frame Generator block to transmit DS3 frames with an erred F
bit.
This F-bit corresponds with the 25th F-bit, within a given out-
bound DS3 frame. The Frame Generator block will perform an
XOR operation with the contents of this bit-field and value of the
25th F-bit. The results of this calculation will be written back into
the 25th F-bit position, within each outbound DS3 frame.
The user should set this bit-field to "0" for normal (e.g., un-erred)
operation.
NOTE: This bit-field is ignored if Bit 7 (TxOHSrc), within the "Test
Register (Direct Address = 0x110C) is set to the "1".
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