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STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
PROPRIETARY AND CONFIDENTIAL
411
RAM Address
Content
(MSB..LSB)
87 56 8F 2CH
87 4E 8F 2CH
87 4E 8F 2CH
87 4E 8F 2CH
8F 4E 9F 2CH
8F 4E 9F 2CH
8F 4E AF 2CH
8F 4E AF 2CH
8F 4E AF 2CH
RAM Address
Content
(MSB..LSB)
FC 19 93 ACH
FC 19 93 ACH
FC 19 93 ACH
FC 19 A3 ACH
FC 19 A3 ACH
FC 19 B3 ACH
FC 19 B3 ACH
FC 19 B3 ACH
FC 19 B3 ACH
119D
120D
121D
122D
123D
124D
125D
126D
127D
247D
248D
249D
250D
251D
252D
253D
254D
255D
The Analog Loss Of Signal feature is available for short haul and ISDN signal
levels only. (Other LOS variants are always available via the CDRC Interrupt
Status and Alternate Loss of Signal registers.) For short haul and ISDN signal
levels, the receiver monitors if the received signal exceeds a predefined peak
amplitude and the ALOSV bit is set when this condition is not meet. The change
in ALOSV state sets the ALOSI bit and can be enabled to assert the INTB.
The RLPS is able to squelch the data in response to an assertion of ALOS.
Since this action is not mandatory, it is not enabled by default. However it can be
desirable to do so in which case data squelching can be enabled by setting the
SQUELCHE register bit to logic 1.
14.6.1 T1 Performance Monitor Mode
The PM4351 COMET can operate in T1 Performance Monitor mode by
programming the Equalizer to operate receiving a signal with a 20 dB flat loss
from nominal as shown.