peb22504 Infineon Technologies Corporation, peb22504 Datasheet - Page 51

• Manufacturer Part Number: peb22504
• Description: Quad Line Interface Unit For E1dt1dj1 Quadliu
• Manufacturer: Infineon Technologies Corporation

4.4.5
In the remote loop-back mode, the clock and data recovered from the line inputs RL1/2
or ROID are routed back to the line outputs XL1/2 or XOID via the analog or digital
transmitter. As in normal mode, they are also processed by the synchronizer and then
sent to the system interface. The remote loop-back mode is selected by setting the
control bits LOOP.RL, LOOP.EJATT and LOOP.XJATT. Received data may be looped
with or without the transmit jitter attenuator (JATT).
Figure 16
Note: If an external loop shall be switched between RDON/RDOP/RCLK and XDIN/
Data Sheet
1)
RL2
1)
XL2
RL1
XL1
JATT either in transmit direction, receive direction or bypassed
JATT either in transmit or receive direction
XDIP/TCLK, the setup/hold time requirements described in the AC characteristics
have to be observed. To relax the timing, the edge selection of either the receive
or transmit path can be inverted (see register description of LIM4), or an inverter
can be placed between RCLK and TCLK externally.
Equalizer
Remote Loop
Driver
Line
Remote Loop Signal Flow
Detector
Shaper
Pulse
Peak
Clock and
Recovery
Data
51
JATT
JATT
1)
1)
Remote Loop
Interface Description
Decoder
Encoder
QuadLIU V1.1
PEB 22504
2001-02
ITS10982
RDON
RDOP
RCLK
XDIN
XDIP
TCLK