PM4351-1 Datasheet, PDF (405/485 Pages) PMC-Sierra, Inc – COMBINED E1/T1 TRANSCEIVER/FRAMER

STANDARD PRODUCT
DATA SHEET
PMC-1970624
ISSUE 10
PM4351 COMET
COMBINED E1/T1 TRANSCEIVER
Octet No. Octet Contents Interpretation
9,10
11,12
13,14
15
Variable
Variable
Variable
01111110
Data for earlier Second(T'-2)
Data for earlier Second(T'-3)
CRC16 Frame Check Sequence
Closing LAPD flag
Table 86 - Performance Report Message Contents
Bit Value
Interpretation
G1=1
G2=1
G3=1
G4=1
G5=1
G6=1
SE=1
FE=1
LV=1
SL=1
LB=1
U1,U2=0
CRC ERROR EVENT =1
1<CRC ERROR EVENT ≤5
5<CRC ERROR EVENT ≤10
10<CRC ERROR EVENT ≤100
100<CRC ERROR EVENT ≤319
CRC ERROR EVENT ≥ 320
Severely Errored Framing Event ≥ 1(FE shall =0)
Frame Synchronization Bit Error Event ≥1 (SE shall=0 )
Line code violation event ≥1
Slip Event ≥ 1
Payload Loopback Activated
Under Study For Synchronization.
R=0
NmNI=00,01,10,
11
Reserved ( Default Value =0)
One second Report Modulo 4 Counter
14.5 Using the Transmit Line Pulse Generator
The internal D/A pulse waveform template registers, accessible via the
microprocessor bus, can be used to create a custom waveform. These 120
pulse waveform storage registers are accessed indirectly through XLPG Pulse
Waveform Storage Write Address and XLPG Pulse Waveform Storage Data
register. The values written into the pulse waveform storage registers
correspond to one of 127 quantized levels. 24 samples are output during every
transmit clock cycle.
PROPRIETARY AND CONFIDENTIAL
381