EELXT332PE.G2-871662 Cortina Systems Inc, EELXT332PE.G2-871662 Datasheet - Page 28

• Manufacturer Part Number: EELXT332PE.G2-871662
• Manufacturer: Cortina Systems Inc

Specifications of EELXT332PE.G2-871662

• Operating Supply Voltage (typ): 5V
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (max): 5.25V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

LXT332
Datasheet
249075, Revision 2.0
26 June 2007
Figure 11
4.9.4
Figure 12
Cortina Systems
Remote Loopback
Dual Loopback
Dual Loopback (DLOOP) is selected when RLOOP = 1, LLOOP = 1 and TAOS = 1. In
DLOOP mode, the transmit clock and data inputs (TCLK and TPOS/TNEG or TDATA) are
looped back through the jitter attenuator (unless disabled by a clock input to the JASEL
pin) and output at RCLK and RPOS/RNEG or RDATA. The data and clock recovered from
the line are looped back through the transmit circuits and output on TTIP and TRING
without jitter attenuation. Unlike the other diagnostic modes, no explicit SIO status
indicator is available for DLOOP in the SIO status register.
Dual Loopback
®
LXT332 Dual T1/E1 Line Interface Unit with Crystal-less Jitter Attenuation
RCLK
RNEG
RPOS
TPOS
TNEG
TCLK
TPOS
TNEG
TCLK
RCLK
RNEG
RPOS
TCLK
TPOS
TNEG
RCLK
RPOS
RNEG
-
(See
+ Tx JA
Local Loopback = LLOOP
Selectable JA
Local Loopback = LLOOP
+ Rx JA
Local Loopback = LLOOP
Dual Loopback
Figure 12
JA*
JA*
0
JA*
0
)
1
Timing &
Recovery
Control
Timing
RLOOP
RLOOP
Recovery
Timing &
1
Control
Timing
1
Timing &
RLOOP
Control
Recovery
Timing
1
*If Enabled
TAOS
*If Enabled
TAOS
*If Enabled
X
X
TAOS
1
4.9 Diagnostic Mode Operation
JASEL
JASEL
0
1
TTIP
TRING
RTIP
RRING
RTIP
RRING
TTIP
TRING
RTIP
RRING
TTIP
TRING
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