XRT72L71 Datasheet, PDF (66/102 Pages) Exar Corporation – DS3 ATM UNI/CLEAR CHANNEL FRAMER

XRT72L71
DS3 ATM UNI/CLEAR CHANNEL FRAMER
REV. 1.1.0
áç
REGISTER 28
TABLE 29: TX DS3 FEAC CONFIGURATION AND STATUS REGISTER
TX DS3 FEAC CONFIGURATION AND STATUS REGISTER
HEX ADDRESS: 0X1C
BIT
FUNCTION
7-5 Unused
TYPE
RO
DEFAULT
0
DESCRIPTION-OPERATION
4 Tx FEAC Interrupt Enable R/W
0: Disables the “Transmit FEAC” Interrupt.
1: Enables the “Transmit FEAC” Interrupt.
0
NOTE: This bit-field is only active if the XRT72L71 is configured to support
the “C-bit Parity” Framing format.
3 Tx FEAC Interrupt Status RUR
0: Indicates that the “Transmit FEAC” Interrupt has not occurred since the
last read of this register.
1: Indicates that the “Transmit FEAC” Interrupt request has occurred since
0
the last read of this register.
NOTE: This bit-field is only active if the XRT72L71 is configured to support
the “C-bit Parity” Framing format.
2 Tx FEAC Enable
0: The Transmit FEAC Processor is disabled, and cannot be commanded to
transmit a FEAC Message to the remote terminal equipment.
1: The Transmit FEAC Processor is enabled, and is able to be commanded
R/W
0
to transmit FEAC Messages to the remote terminal equipment.
NOTE: This bit-field is only active if the XRT72L71 is configured to support
the “C-bit Parity” Framing format.
1 Tx FEAC Go
0 to 1 transition within this bit-field commands the Transmit FEAC Processor
to begin its transmission of the FEAC Message, which resides within the
R/W
0
“TxFEAC” Register.
NOTE: This bit-field is only active if the XRT72L71 is configured to support
the “C-bit Parity” Framing format.
0 Tx FEAC Busy
0: Indicates that the Transmit FEAC Processor is NOT currently transmitting
a FEAC Message to the remote terminal equipment
1: Data from FEAC register is currently being transmitted to the remote ter-
RO
0
minal equipment.
NOTE: This bit-field is only active if the XRT72L71 is configured to support
the “C-bit Parity” Framing format.
REGISTER 29
BIT
FUNCTION
7 Unused
6 Tx FEAC (5)
5 Tx FEAC (4)
4 Tx FEAC (3)
3 Tx FEAC (2)
2 Tx FEAC (1)
1 Tx FEAC (0)
0 Unused
TYPE
RO
R/W
R/W
R/W
R/W
R/W
R/W
RO
TABLE 30: TX DS3 FEAC REGISTER
TX DS3 FEAC REGISTER
HEX ADDRESS 0X1D
DEFAULT
DESCRIPTION-OPERATION
0
1
1
Contains the value of the FEAC Code (or Message) that is to be transmitted
to the remote terminal equipment. The LSB of this bit-field will be transmit-
1
ted first.
1
NOTE: This register is only active if the XRT72L71 has been configured to
operate in the “C-bit Parity” Framing Format
1
1
0
62