XRT84L38IB Exar Corporation, XRT84L38IB Datasheet - Page 324

• 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

XRT84L38
OCTAL T1/E1/J1 FRAMER
The Fs bits in SLC®96 and N framing format mode can be inserted from:
•
•
•
The Transmit Data Link Source Select bits of the Transmit Data Link Select Register (TDLSR) controls the
insertion of data link bits into the Fs bits in N or SLC®96 framing format mode. The table below shows
configuration of the Transmit Data Link Source Select bits of the Transmit Data Link Select Register (TDLSR).
TRANSMIT DATA LINK SELECT REGISTER (TDLSR) (INDIRECT ADDRESS = 0XN0H, 0X0AH)
If the Transmit Data Link Source Select bits of the Transmit Data Link Select Register are set to 10, the
Transmit Overhead Input Interface Block becomes input source of the Fs bits.
Figure 101
Overhead Input Interface module in N or SLC®96 framing format mode.
The R bits in T1DM framing format mode can be inserted from:
•
•
•
F
7.1.3
7.1.4
IGURE
N
DS1 Transmit Overhead Input Interface Block
DS1 Transmit HDLC Controller
DS1 Transmit Serial Input Interface.
DS1 Transmit Overhead Input Interface Block
DS1 Transmit HDLC Controller
DS1 Transmit Serial Input Interface.
UMBER
B
1-0
IT
101. DS1 T
TxOhClk (4kHz)
Configure the DS1 Transmit Overhead Input Interface module as source of the Signaling
Framing (Fs) bits in N or SLC®96 framing format mode
Signaling (R) bits in T1DM framing format mode
Configure the DS1 Transmit Overhead Input Interface module as source of the Remote
TxOh (4kHz)
below shows the timing diagram of the input and output signals associated with the DS1 Transmit
Transmit Data Link
Source Select
Frame #
B
TxSync
IT
N
RANSMIT
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
I
NPUT
00 - The Signaling Framing bits are inserted into the framer through either
the LAPD controller or the SLCâ96 buffer.
01 - The Signaling Framing bits are inserted into the framer through the
Transmit Serial Data input Interface via the TxSer_n pins.
10 - The Signaling Framing bits are inserted into the framer through the
Transmit Overhead Input Interface via the TxOH_n pins.
11 - The Signaling Framing bits are forced to one by the framer.
T
IMING IN
304
N
OR
SLC®96 F
B
IT
D
RAMING
ESCRIPTION
F
ORMAT
M
ODE
REV. 1.0.1