XRT86L30
SINGLE T1/E1/J1 FRAMER/LIU COMBO
REV. 1.0.1
TABLE 49: DS1 TEST REGISTER
Register 34
DS1 Test Register (DS1TR)
0x0123
B
IT
FUNCTION
TYPE
D
EFAULT
DESCRIPTION-OPERATION
5
Reserved
-
-
Reserved
4
3
2
1
0
RxPRBSLock
R
0
Lock Status
0 = Rx PRBS has not Locked.
1 = Rx PRBS has locked to the input patterns.
RxPRBSEnb
TxPRBSEnb
RxDS1Bypass
TxDS1Bypass
R/W
R/W
R/W
R/W
0
0
0
0
Rx PRBS Generation Enable
0 = Receive PRBS checker is not enabled.
1 = Receive PRBS checker is enabled.
Tx PRBS Generation Enable
0 = Tx PRBS generator is not enabled.
1 = Tx PRBS generator is enabled.
Rx DS1 Framer Bypass
0 = Disabled
1 = Rx DS1 Framer Bypass Mode.
Tx DS1 Framer Bypass
0 = Disabled
1 = Tx DS1 Framer Bypass Mode.
TABLE 50: LOOPBACK
C
ODE
C
ONTROL
REGISTER
Register 35
L
OOPBACK ODE ONTROL
C
C
R
EGISTER (LCCR)
0X0124
B
IT
FUNCTION
TYPE
D
EFAULT
DESCRIPTION-OPERATION
7-6 RXLBCDLEN[1:0]
5-4 RXLBCDLEN[1:0]
3-2 TXLBCDLEN[1:0]
R/W
R/W
R/W
0
Receive Loopback Code Activation Length
Determines the receive loopback code activation length.
00 = 4-bit sequence
01 = 5-bit sequence
10 = 6-bit sequence
11 = 7-bit sequence
0
0
Receive Loopback Code Deactivation Length
Determines the receive loopback code deactivation length
00 = 4-bit sequence
01 = 5-bit sequence
10 = 6-bit sequence
11 = 7-bit sequence
Transmit Loopback Code Length
Determines transmit loopback code length.
00 = 4-bit sequence
01 = 5-bit sequence
10 = 6-bit sequence
11 = 7-bit sequence
69
EXAR [ EXAR CORPORATION ]
