PEF80912HV1.4XT Infineon Technologies, PEF80912HV1.4XT Datasheet - Page 33

• Manufacturer Part Number: PEF80912HV1.4XT
• Manufacturer: Infineon Technologies

Specifications of PEF80912HV1.4XT

• Lead Free Status / Rohs Status: Compliant

Table 9
Signal
SN3T
Test Mode
SP
Note:
Note:
Input Signals of the State Machine and related U-Signals
The table below summarizes the input signals that control the NT state machine and that
are extracted from the U-interface signal sequences.
•
LOF
LSEC
LSU
LSUE
FD
SFD
Data Sheet
2)
1)
2)
Alternating ± 3 symbols at 10 kHz.
A series of single pulses spaced at intervals of 1.5 ms; alternating +/-3.
U-Interface Signals(cont’d)
Loss of framing
This condition is fulfilled if framing is lost for 573 ms.
Loss of signal behind echo canceller
Internal Signal which indicates that the echo canceller has converged
Loss of Signal on U-Interface
This signal indicates that a loss of signal level for a duration of 3 ms has
been detected on the U-interface. This short response time is relevant in
all cases where the NT waits for a response (no signal level) from the LT-
side.
Loss of Signal on U-Interface - Error condition
After a loss of signal has been noticed, a 588 ms timer is started. When
it has elapsed , the LSUE-criterion is fulfilled. This long response time
(see also LSU) is valid in all cases where the NT is not prepared to lose
signal level i.e. the LT has stopped transmission because of loss of
framing, an unsuccessful activation, or the transmission line is
interrupted.
Frame Detected
Super Frame Detected
Synch. Word
(SW)
present
test signal
Superframe
(ISW)
present
test signal
25
2B + D
normal
test signal
Functional Description
PEF 80912/80913
M-Bits
normal
test signal
2001-03-29