XRT84L38IB Exar Corporation, XRT84L38IB Datasheet - Page 329

• Manufacturer Part Number: XRT84L38IB
• Description: Network Controller & Processor ICs 8 Ch T1/E1 Framer
• Manufacturer: Exar Corporation

Specifications of XRT84L38IB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REV. 1.0.1
Figure 105
Output Interface module in N or SLC®96 framing format mode.
The R bits in T1DM framing format mode can be extracted to:
•
•
•
The Receive Data Link Source Select bits of the Receive Data Link Select Register (RDLSR) controls the
destination of R bits in T1DM 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 (RDLSR) (INDIRECT ADDRESS = 0XN0H, 0X0AH)
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 the R bits extracted from the incoming T1 data stream. Since R bit
presents in Timeslot 24 of every T1DM frame, therefore, bandwidth of T1DM data link channel is 8KHz.
F
7.2.4
IGURE
N
DS1 Receive Overhead Output Interface Block
DS1 Receive HDLC Controller
DS1 Receive Serial Output Interface.
UMBER
B
1-0
RxOhClk (4kHz)
IT
105. DS1 R
RxOh (4kHz)
Configure the DS1 Receive Overhead Output Interface module as destination of the Remote
Signaling (R) bits in T1DM framing format mode
below shows the timing diagram of the output signals associated with the DS1 Receive Overhead
Receive Data Link
Frame #
RxSync
Source Select
B
IT
N
ECEIVE
AME
O
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
VERHEAD
B
IT
R/W
T
YPE
O
UTPUT
00 - The extracted Facility Data Link bits are stored in either the LAPD con-
troller or the SLC
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.
I
NTERFACE
309
®
T
96 buffer. At the same time, the extracted Facility Data
IMING IN
N
B
IT
OR
D
ESCRIPTION
SLC®96 F
OCTAL T1/E1/J1 FRAMER
RAMING
F
ORMAT MODE
XRT84L38