XRT79L71_1 Datasheet, PDF (200/434 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC -

XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - REGISTER/MAP DESCRIPTION
REV. 1.0.0
BIT NUMBER
NAME
1
Errored Second
0
Severely Errored Second
TYPE
R/O
R/O
DESCRIPTION
Errored Second Indicator:
This READ-ONLY bit-field indicates whether or not the DS3/E3
Framer block has declared the last one-second accumulation
period as a Errored Second. The DS3/E3 Framer block will
declare a errored second if it detects any of the following events.
For DS3 Applications
• P-Bit Errors
• CP Bit Errors
• Framing Bit (F or M bit) Errors
For E3 Applications
• BIP-4/BIP-8 Errors
• FAS or Framing Byte (FA1, FA2) Errors
0 - Indicates that the DS3/E3 Framer block has NOT declared
the last one-second accumulation period as being an errored
second.
1 - Indicates that the DS3/E3 Framer block has declared the last
one-second accumulation period as being an errored second.
Severely Errored Second Indicator:
This READ-ONLY bit-field indicates whether or not the DS3/E3
Framer block has declared the last one second accumulation
period as being a Severely Errored Second.
The DS3/E3 Framer block will declare a given second as being a
severely errored second if it determines that the BER (Bit Error
Rate) during this One-second accumulation period is greater
than 10^-3 errors/second.
0 - Indicates that the DS3/E3 Framer block has not declared the
last one-second accumulation period as being a severely-
errored second.
1 - Indicates that the DS3/E3 Framer block has declared the last
one-second accumulation period as being a severely-errored
second.
One Second - LCV Count Accumulator Register - MSB (Address = 0x116E)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
One_Second_LCV_Count_Accum_MSB[7:0]
R/O
R/O
R/O
R/O
R/O
R/O
0
0
0
0
0
0
BIT 1
R/O
0
BIT 0
R/O
0
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