XRT83VSH314ES Exar, XRT83VSH314ES Datasheet - Page 19

• Manufacturer Part Number: XRT83VSH314ES
• Description: Peripheral Drivers & Components - PCIs 14 CHT1/E1LIUSH LOW COST VERSION
• Manufacturer: Exar

Specifications of XRT83VSH314ES

• Product Category: Peripheral Drivers & Components - PCIs
• Rohs: yes

REV. 1.0.1
In system design, fewer clocks on the network card could reduce noise and interference. Network cards that
support both T1 and E1 modes must be able to produce 1.544MHz and 2.048MHz transmission data. The
XRT83VSH314 has a built in clock synthesizer that requires only one input clock reference by programming
CLKSEL[3:0] in the appropriate global register. A list of the input clock options is shown in
The single input clock reference is used to generate multiple timing references. The first objective of the clock
synthesizer is to generate 1.544MHz and 2.048MHz for each of the 14 channels. This allows each channel to
operate in either T1 or E1 mode independent from the other channels. The state of the equalizer control bits in
the appropriate channel registers determine whether the LIU operates in T1 or E1 mode. The second objective
is to generate additional output clock references for system use. The available output clock references are
shown in
F
2.0 CLOCK SYNTHESIZER
IGURE
2. S
Figure
Input Clock
IMPLIFIED
2.
B
LOCK
Synthesizer
MCLKE1Nout
MCLKT1Nout
D
MCLKT1out
MCLKE1out
Clock
IAGRAM OF THE
8kHzOUT
CLKSEL[3:0]
0h (0000)
1h (0001)
8h (1000)
9h (1001)
Ah (1010)
Bh (1011)
Ch (1100)
Dh (1101)
Eh (1110)
Fh (1111)
T
ABLE
1: I
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
Programmable
Programmable
NPUT
C
Reference
1.544MHz
2.048MHz
LOCK
Internal
C
LOCK
16
S
YNTHESIZER
S
OURCE
I
NPUT
C
16.384 MHz
12.352 MHz
2.048 MHz
4.096 MHz
3.088 MHz
8.192 MHz
6.176 MHz
2.048 MHz
1.544 MHz
1.544MHz
LOCK
S
ELECT
8kHz
2.048MHz
1.544Mhz
2.048/4.096/8.192/16.384 MHz
1.544/3.088/6.176/12.352MHz
R
EFERENCE
XRT83VSH314
Table
1.