PEF2256EV22NP Lantiq, PEF2256EV22NP Datasheet - Page 174

• Manufacturer Part Number: PEF2256EV22NP
• Manufacturer: Lantiq

Specifications of PEF2256EV22NP

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Supplier Unconfirmed

Table 44
Range in
m
Serial Resistor Value: 4
0 to 40
40 to 81
81 to 122
122 to 162 399 to 533 3E
162 to 200 533 to 655 5F
Changes in the PCM mode bit (FMR1.PMOD) or write operations to the GCM5 or GCM6
Register may result in an enlarged pulse width on the transmit line interface, see
Chapter
7.4.6
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 120 mA for
at least 3 consecutive pulses sourced by V
by setting the transmit line driver XL1/2 into high-impedance state automatically (if
enabled by XPM2.DAXLT = 0). 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 de-jitteredity (more than 31
consecutive zeros) indicated by FRS1.XLO and transmit line high current indicated by
FRS1.XLS. In both cases a transmit line monitor status change interrupt is provided.
1)
Data Sheet
shorts between XL1 or XL2 and V
2.7.
Transmit Line Monitor (T1/J1)
Range in
ft.
0 to 133
133 to 266 B6
266 to 399 3C
Pulse Shaper Programming (T1/J1) (cont’d)
XPM0
19
DDX
hexadecimal
are not detected
XPM1
9F
1E
27
37
C3
174
DDX
XPM2
1
1
1
1
1
1)
) and protects the device from damage
XP04-
XP00
Functional Description T1/J1
XP14-
XP10
decimal
Rev. 1.1, 2005-06-13
PEF 2256 H/E
XP24-
XP20
FALC
XP34-
XP30
®
56