EELXT332PE.G2-871662 Cortina Systems Inc, EELXT332PE.G2-871662 Datasheet - Page 27

• 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 10
4.9.3
Cortina Systems
Local Loopback
Remote Loopback
Remote Loopback (RLOOP) is selected when RLOOP = 1 and LLOOP = 0. Note that
TAOS cannot be commanded when Remote Loopback is selected. In RLOOP mode, the
transmit clock and data inputs (TCLK and TPOS/TNEG or TDATA) are ignored. The
RPOS/RNEG or RDATA outputs are looped back to the transmit circuits and output on
TTIP and TRING at the RCLK frequency. Receiver circuits are unaffected by the RLOOP
command and continue to output the data and clock signals received from the line.
During Remote Loopback, the JASEL input functions as follows: If JASEL = 1, JA is
enabled and active in both the Receive path and the loopback circuit. If JASEL = 0, JA is
enabled in the Loopback circuit only. If JASEL = MCLK, JA is disabled.
®
LXT332 Dual T1/E1 Line Interface Unit with Crystal-less Jitter Attenuation
-
Selectable JA
TCLK
RCLK
RNEG
RPOS
TPOS
TNEG
TPOS
TNEG
TCLK
RCLK
RNEG
RPOS
+ Tx JA
Local Loopback = LLOOP
Local Loopback = LLOOP
+ Rx JA
(See
Figure 11
*If Enabled
JA*
1
1
JA*
Recovery
Timing &
Control
Timing
)
RLOOP
Recovery
Timing &
RLOOP
0
Control
Timing
0
*If Enabled
TAOS
0
TAOS
0
4.9 Diagnostic Mode Operation
JASEL
0
JASEL
1
RTIP
RRING
TTIP
TRING
TTIP
TRING
RTIP
RRING
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