PEF22558EV11GXP Lantiq, PEF22558EV11GXP Datasheet - Page 59

• Manufacturer Part Number: PEF22558EV11GXP
• Manufacturer: Lantiq

Specifications of PEF22558EV11GXP

• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

TM
OctalFALC
PEF 22558 E
Test and Maintenance
If ALS.SOLS is set, the payload loop is activated after the “payload loopback activate“
code was detected from the line side or the system side and if the local loop is not
activated by LIM0.LL = ´1´. The payload loop is deactivated after an appropriate
deactivation Out-Band loop code was detected from the line side or the system side. (But
if the payload loop is additionally activated by FMR2.PLB = ´1´ the payload loop is still
active, because automatic loop switching is logically ored with the appropriate loop
switching by register bits.)
If ALS.LOLS is set, the remote loop is activated after the “line loopback activate” code
was detected from the line side or the system side and if the local loop is not activated
by LIM0.LL = ´1´. The remote loop is deactivated after the “line loopback deactivate”
code was detected from the line side or the system side. (But if the remote loop is
additionally activated by LIM0.RL = ´1´ the remote loop is still active, because automatic
loop switching is logically ored with the appropriate loop switching by register bits.)
If the remote loop is activated by an automatic loop switching the register bit LIM0.JATT
controls also if the jitter attenuator is active or not.
ALS.SOLS and ALS.LOLS both can be set to ´1´ simultaneous.
Because BOM messages coming from the system side are not included in the E1/T1/J1
standards, receive of these BOM messages and the possibility of automatic loop
TM
switching (ALS.SOLS) are features of the OctalFALC
. It has to be handle carefully to
avoid deadlocks.
If ALS.SOLS or ALS.LOLS are set after an Out-Band loop code was detected, no
automatic loop switching is performed.
If ALS.LOLS is cleared, an automatic activated remote loop is deactivated.
If ALS.SOLS is cleared, an automatic activated payload loop is deactivated.
The kind of performed automatic loop switching caused by the appropriate detected Out-
band message is shown in the register bits ISR6.(7:4). Masking of ISR6.(7:4) for
controlling of the interrupt can be done by register bits IMR6.(7:4). If an Out-band
message were detected, the appropriate register bits ISR6.(7:4) will be set to ´1´,
independent if automatic loop switching has been enabled. (Because the micro controller
knows if automatic loop switching is enabled, it knows if a loop is activated or not.)
A detection of an Out-band loop message (BOM) “universal loopback deactivate” sets
both bits ISR6.SOLSD and ISR6.LOLSD, independent if a loop is active (switched) or
not. Dependent on ALS.LOLS or ALS.SOLS the remote or the payload loopback is
switched off respectively.
A received BOM message causes setting of the interrupt bit ISR0.RME and is stored in
the receive FIFO, marked with a BOM frame.
Note that detection of Out-band Loop messages (BOM codes) is only possible either on
the line side or the system side, dependent on the configuration of the HDLC controller:
If the HDLC/BOM controller 1 is attached to the line side (MODE.HDLCI = ´0´) only BOM
messages coming from the line side can be detected. If the HDLC/BOM controller is
Delta Sheet
59
Rev. 2.0, 2005-05-03