xrt75r12 Exar Corporation, xrt75r12 Datasheet - Page 81

• Manufacturer Part Number: xrt75r12
• Description: Twelve Channel E3/ds3/sts-1 Line Interface Unit With Jitter
• Manufacturer: Exar Corporation

REV. 1.0.4
B
IT
N
UMBER
4
3
2
T
ABLE
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
RLB_n
LLB_n
N
E3_n
40: C
AME
HANNEL
T
C
R/W
R/W
R/W
YPE
ONTROL
Loop-Back Select - RLB Bit - Channel_n:
This READ/WRITE bit-field along with the corresponding LLB_n bit-field is
used to configure a given channel into various loop-back modes ass shown
by the following table.
Loop-Back Select - LLB Bit-field - Channel_n:
See the table (above) for RLB_n.
E3 Mode Select - Channel_n:
This READ/WRITE bit-field, along with Bit 1 (STS-1/DS3_n) within this reg-
ister, is used to configure a given channel into either the DS3, E3 or STS-1
Modes.
0 - Configures Channel_n to operate in either the DS3 or STS-1 Modes,
depending upon the state of Bit 1 (STS-1/DS3_n) within this same register.
1- Configures Channel_n to operate in the E3 Mode.
(n = [0:11] &
R
EGISTER
LLB_n
0
0
1
1
78
M
- C
= 0-5 & 8-D)
HANNEL
RLB_n
0
1
0
1
n A
D
DDRESS
ESCRIPTION
Analog Local Loop-back Mode
Digital Local Loop-back Mode
Norm al (No Loop-back) Mode
Rem ote Loop-back Mode
Loop-back M ode
L
OCATION
= 0
XM
6
XRT75R12