XRT84L38IB Exar Corporation, XRT84L38IB Datasheet - Page 225

• 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
Inside the framer, all the "don't care" bits will be stripped away. The framing bits, signaling and payload data are
de-multiplexed inside the XRT84L38 and send to each individual channel. These data will be processed by each
individual framer and send to LIU interface. The local Terminal Equipment provides a free-running 1.544MHz
clock to the Transmit Serial Input clock of each channel. The framer will use this clock to carry the processed
payload and signaling data to the transmit section of the device.
See
Interface block of the framer in Bit-multiplexed 16.384Mbit/s mode.
The Input signal timing is shown in
mode.
When the Transmit Multiplex Enable bit is set to one and the Transmit Interface Mode Select [1:0] bits are set to
10, the Transmit Back-plane interface of framer is running at a clock rate of 16.384MHz.
F
F
16.384M
4.1.3.6
IGURE
IGURE
TxSerClk (16.384MHz)
TxSerClk (INV)
TxSer
TxSync(input)
Figure 37
37. I
38. T
BIT
/
S
NTERFACING
IMING
T1 Transmit Input Interface - HMVIP 16.384Mbit/s
M
below for how to interface the local Terminal Equipment with the Transmit Payload Data Input
ODE
D
F
0
IAGRAM OF THE
F
0
F
Equipment
1
XRT84L38
F
Terminal
1
F
2
F
2
F
3
F
3
Figure 38
I
TO THE
NPUT
56 cycles
TxSer_0
TxInClk_0 (16.384MHz)
TxSync_0
TxSerClk_0 (1.544MHz)
TxSerClk_1 (1.544MHz)
TxSerClk_2 (1.544MHz)
TxSerClk_3 (1.544MHz)
TxSer_4
TxInClk_4 (16.384MHz)
TxSync_4
TxSerClk_4 (1.544MHz)
TxSerClk_5 (1.544MHz)
TxSerClk_6 (1.544MHz)
TxSerClk_7 (1.544MHz)
S
IGNALS TO THE
L
OCAL
below when the framer is running at Bit-Multiplexed 16.384Mbit/s
1
0
X 1
T
1
ERMINAL
205
X
1
2
X
1
F
3
RAMER WHEN RUNNING AT
X
E
2
QUIPMENT USING
0
X 2
1
X
Data Input
Data Input
Transmit
Interface
Transmit
Interface
Payload
Payload
Chn 0
Chn 1
Chn 2
Chn 3
Chn 4
Chn 5
Chn 6
Chn 7
3
XRT84L38
0
X
16.384M
4
OCTAL T1/E1/J1 FRAMER
0
X
B
IT
5
BIT
0
-M
A
0
/
5
ULTIPLEXED
S
1
A
D
1
XRT84L38
5
ATA
2
A
2
5
B
3
A
US
3