XRT79L71_1 Datasheet, PDF (143/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

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XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
BIT NUMBER
NAME
3
Tx P-Bit Error
2-0
TxM_Bit_Mask[2:0]
TYPE
R/W
R/W
DECRIPTION
Transmit P-Bit Error:
This READ/WRITE bit-field permits the user to configure the
Transmit DS3 Framer block to transmit DS3 frames with erred P-
bits, as indicated below.
0 - Configures the Transmit DS3/E3 Framer block to generate
and transmit DS3 frames with correct P-bits, to the remote termi-
nal equipment.
1 - Configures the Transmit DS3/E3 Framer block to generate
and transmit DS3 frames with erred P-bits, to the remote termi-
nal equipment.
Transmit M-Bit Error:
These READ/WRITE bit-fields permit the user to configure the
Transmit DS3 Framer block to transmit DS3 frames with erred
M-bits.
These three (3) bit-fields correspond to the three M-bits, within
each outbound DS3 frame. The Transmit DS3 Framer block will
perform an XOR operation with the contents of these bit-fields
and the value of the three M-bits. The results of this calculation
will be written back into the M-bit positions within each outbound
DS3 frame.
The user should set these bit-fields to "0, 0, 0" for normal (e.g.,
un-erred) operation.
Transmit DS3 F-Bit Mask # 1 Register (Address = 0x1136)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
Unused
F_Bit
Mask[27]/
UDL Bit # 9
(C73)
R/O
R/O
R/O
R/O
R/W
0
0
0
0
0
BIT 2
F_Bit
Mask [26]/
UDL Bit # 8
(C72)
R/W
0
BIT 1
F_Bit
Mask [25]/
UDL Bit# 7
(C71)
R/W
0
BIT 0
F_Bit
Mask [24]/
R/W
0
BIT NUMBER
NAME
7-4
Unused
TYPE
R/O
DESCRIPTION
134