CX28394/28395/28398
3.0 Registers
Quad/x16/Octal—T1/E1/J1 Framers
3.10 Performance Monitoring Registers
059—PRBS Bit Error Counter MSB (BERR)
15
14
13
12
11
10
9
8
0
0
0
0
BERR[11]
BERR[10]
BERR[9]
BERR[8]
BERR[11:8]
BERR Count (suspended if BSTART = 0)
05A—SEF/FRED/COFA Alarm Counter (AERR)
Reading AERR clears the SEF[1:0], COFA[1:0] and FRED[3:0] count values.
7
6
5
4
3
2
1
0
FRED[3]
FRED[2]
FRED[1]
FRED[0]
COFA[1]
COFA[0]
SEF[1]
SEF[0]
FRED[3:0]
Receive loss of basic frame alignment count—Increments for each occurrence of FRED
[ALM3; addr 049]. The four bit count is large enough to count more than 100 ms worth of
MFAS timeout intervals (8 ms each) during E1 modes. Processor may therefore use FRED
counter overflow interrupt to indicate that a receive MFAS alignment search has timed out.
COFA[1:0]
SEF[1:0]
Change of Frame Alignment Count—Increments each time the offline framer generates a
reframe pulse that aligns the receiver timebase to a new bit position.
Severely Errored Frame Count—Increments for each occurrence of SEF [ALM3; addr 049].
100054E
Conexant
3-51
CONEXANT [ CONEXANT SYSTEMS, INC ]
