XRT86L30
REV. 1.0.1
SINGLE T1/E1/J1 FRAMER/LIU COMBO
The Receive Data Link Source Select bits of the Receive Data Link Select Register (RDLSR) controls the
destination of Fs bits in N or SLC®96 framing format mode. The table below shows configuration of the
Receive Data Link Source Select bits of the Receive Data Link Select Register (RDLSR).
RECEIVE DATA LINK SELECT REGISTER (TDLSR) (ADDRESS = 0X010AH)
B
IT
B
IT
N
AME
B
IT
TYPE
BIT DESCRIPTION
N
UMBER
1-0
Receive Data Link
Source Select
R/W
00 - The extracted Facility Data Link bits are stored in either the LAPD con-
troller or the SLC®96 buffer. At the same time, the extracted Facility Data
Link bits are outputted from the framer through the Receive Serial Data
Output Interface via the RxSer_n pins.
01 - The extracted Facility Data Link bits are outputted from the framer
through the Receive Serial Data Output Interface via the RxSer_n pins.
10 - The extracted Facility Data Link bits are outputted from the framer
through the Receive Overhead Output Interface via the RxOH_n pins. At
the same time, the extracted Facility Data Link bits are outputted from the
framer through the Receive Serial Data Output Interface via the RxSer_n
pins.
11 - The Facility Data Link bits are forced to one by the framer.
If the Receive Data Link Source Select bits of the Receive Data Link Select Register are set to 10, the Receive
Overhead Output Interface Block outputs Fs bits extracted from the incoming T1 data stream.
Figure 42 below shows the timing diagram of the output signals associated with the DS1 Receive Overhead
Output Interface module in N or SLC®96 framing format mode.
FIGURE 42. DS1 RECEIVE OVERHEAD OUTPUT INTERFACE TIMING IN N OR SLC®96 FRAMING FORMAT MODE
7.2.4
Configure the DS1 Receive Overhead Output Interface module as destination of the Remote
Signaling (R) bits in T1DM framing format mode
The R bits in T1DM framing format mode can be extracted to:
•
•
•
DS1 Receive Overhead Output Interface Block
DS1 Receive HDLC Controller
DS1 Receive Serial Output Interface.
176
EXAR [ EXAR CORPORATION ]
