PEB24911HV13 Lantiq, PEB24911HV13 Datasheet - Page 75

• Manufacturer Part Number: PEB24911HV13
• Manufacturer: Lantiq

Specifications of PEB24911HV13

• Lead Free Status / Rohs Status: Supplier Unconfirmed

– TN detected for 8 periods –> transfer within the “Deactivated” state into power-up
– In power-up both differential outputs, AOUTx and BOUTx, are set to the common mode DC level
– TN detected for a total of 12 consecutive periods –> transition criterion TN fulfilled, change to
– TN detected for more than 8 but less than 12 periods –> return to power-down
The input sensitivity is stated in the AFE V1.1 Data Sheet. There the minimum level
required is specified to meet the TN transition criterion. The power-up condition may thus
already be entered at a lower level.
EC Converged
Upon the EC-coefficients having converged, the U-transceiver starts the transmission of
signal SL2 and waits for the receipt of signal SN2 from the NT (SEC). If no signal is
detected within T6, nevertheless the start-up procedure will be continued. In the case of
an analog loop-back, this state is left immediately because the EC compensates for the
looped back transmit signal.
EC-Training
The signal SL1 is transmitted on the U-interface to allow the LT-receiver to update its
EC-coefficients. The “EC-training” state is left when the EC has converged (LSEC) or
when timer T5 has elapsed. Timer T5 allows the start-up procedure to proceed even if
LSEC due to a high noise level on the U-interface for instance, could not be detected.
EQ-Training
In state “EQ-Training” the equalizer coefficients are trained for a minimum period of
3 ms. Upon expiry of timer T2 state “EQ-Training 1” is entered.
Line Active
In the “Line Active” state, the U-transceiver transmits transparently in both directions.
The U-Interface is synchronized and the maintenance channel is operational. The U-
transceiver stays in the line-active state
– during a normal activation procedure while the “ACT” bit = (0) is received
– when an analog loop-back is established
– while C/I-command AR0 is applied to DIN
In the case of normal activation with call control, binary “0s” have to be applied to the B
and D channels on the IOM
issued, the layer-2 receiver should be fully operational to prevent the first layer-2
message issued by the NT-side upon the receipt of the AI-code in the TE, to be lost.
Data Sheet
of VDDmin/2
next state, if in addition the C/I-command DC is given on DIN.
®
-interface. After the C/I-channel indication UAI has been
65
Functional Description
PEF 24911
2001-07-16