peb22504 Infineon Technologies Corporation, peb22504 Datasheet - Page 48

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

4.2.5
The transmit line monitor compares the transmit line current on XL1 and XL2 with an on-
chip transmit line current limiter. The monitor detects faults on the primary side of the
transformer indicated by a highly-increased transmit line current (more than about
120 mA for at least three "1" pulses), and protects the device from damage by
automatically setting the transmit line driver XL1/2 in a high-impedance state. The
current limiter checks the actual current value of XL1/2, and if the transmit line current
drops below the detection limit, the high-impedance state is cleared.
Two conditions are detected by the monitor: transmit line ones density (more than 31
consecutive zeros) indicated by LSR1.XLO and transmit line high currrent indicated by
LSR1.XLS. In both cases a transmit line monitor status change interrupt is provided.
The transmit line monitor function can be disabled by LIM5.XLM = 0 to reduce power
consumption.
Figure 15
4.3
The system side interface to the receive framer interface is realized by RDOP, RDON
and RCLK. Data on RDOP/N is clocked with either the rising or falling edge of RCLK
(LIM4.RPE, see
Data from the framer interface is sampled at XDIP and XDIN on the active edge of TCLK.
The active edge can be the rising or falling edge of TCLK (LIM4.TPE). An automatic
clock-switching mode can be enabled (LIM5.ACS = 1) to switch automatically to the
clock provided on pin SYNC if TCLK is missing. The selected edge (rising falling) also
applies to SYNC, if selected by automatic switching.
Data Sheet
Transmit Line Monitor
Framer Interface
Transmit Line Monitor Configuration
Figure 10
on
XL1
XL2
page
38).
Monitor
48
Line
TRI
Shaper
Pulse
XDATA
Interface Description
ITS10936
QuadLIU V1.1
PEB 22504
2001-02