參數資料
型號: DS3160
元件分類: 通信及網絡
英文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數: 61/107頁
文件大?。?/td> 592K
代理商: DS3160
DS3160
61 of 107
6. BERT
6.1 General Description
The BERT block is capable of generating and detecting the following patterns:
the pseudorandom patterns 2
7
- 1, 2
11
- 1, 2
15
- 1, and QRSS
a repetitive pattern from 1 to 32 bits in length
alternating (16-bit) words that flip every 1 to 256 words
The BERT receiver has a 32-bit bit counter and a 24-bit error counter. It can generate interrupts on
detecting a bit error, a change in synchronization, or if an overflow occurs in the bit and error counters.
See Section 6.2 for details on status bits and interrupts from the BERT block. To activate the BERT
block, the host must configure the BERT mux by the BERT mux control register (Section 6.2).
6.2 BERT Register Description
Register Name:
Register Description:
Register Address:
BERTMC
BERT Mux Control Register
20h
Bit #
Name
Default
7
6
5
4
3
2
1
0
N/A
0
N/A
0
N/A
0
N/A
0
TBS1
0
TBS0
0
RBS1
0
RBS0
0
Bit #
Name
Default
15
N/A
0
14
N/A
0
13
N/A
0
12
N/A
0
11
N/A
0
10
N/A
0
9
8
N/A
0
N/A
0
Note:
Bits that are underlined are read-only; all other bits are read-write.
Bits 0 to 1/Receive BERT Select Bits 0 to 1 (RBS0 to RBS1).
These bits enable/disable the BERT
receiver and select how BERT data is sent to the receiver (active timeslot bits only or active timeslot and
the overhead bits).
RBSI
0
RBS0
0
DESCRIPTION
Disabled
Active Timeslots Only
6Mbps: TS1–TS96
4.5Mbps: TS1–TS72
3Mbps: TS1–TS48
1.5Mbps: TS1–TS24
Entire Frame including F-Bits (all 789 bits)
Illegal State
0
1
1
1
0
1
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