參數(shù)資料
型號: DS3160
元件分類: 通信及網(wǎng)絡(luò)
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(shù): 67/107頁
文件大小: 592K
代理商: DS3160
DS3160
67 of 107
Register Name:
Register Description:
Register Address:
BERTBC0
BERT 32-Bit Bit Counter (lower word)
2Ah
Bit #
Name
Default
7
6
5
4
3
2
1
0
BBC7
0
BBC6
0
BBC5
0
BBC4
0
BBC3
0
BBC2
0
BBC1
0
BBC0
0
Bit #
Name
Default
15
14
13
12
11
10
9
8
BBC15
0
BBC14
0
BBC13
0
BBC12
0
BBC11
0
BBC10
0
BBC9
0
BBC8
0
Register Name:
Register Description:
Register Address:
BERTBC1
BERT 32-Bit Bit Counter (upper word)
2Ch
Bit #
Name
Default
7
6
5
4
3
2
1
0
BBC23
0
BBC22
0
BBC21
0
BBC20
0
BBC19
0
BBC18
0
BBC17
0
BBC16
0
Bit #
Name
Default
15
14
13
12
11
10
9
8
BBC31
0
BBC30
0
BBC29
0
BBC28
0
BBC27
0
BBC26
0
BBC25
0
BBC24
0
Note:
Bits that are underlined are read-only; all other bits are read-write.
Bits 0 to 31/BERT 32-Bit Bit Counter (BBC0 to BBC31).
This 32-bit counter increments for each data
bit (i.e., clock received). This counter is not disabled when the receive BERT loses synchronization. It can
be cleared by toggling the LC control bit in BERTC0. It saturates and does not rollover. Upon saturation,
the BBCO status bit in the BERTEC0 register is set. This error counter starts counting when the BERT
goes into receive synchronization (RLOS = 0 or SYNC = 1) and does not stop counting when the BERT
loses synchronization. It is recommended that the host toggle the LC bit in the BERTC0 register once the
BERT has synchronized and then toggle the LC bit again when the error-checking period is complete. If
the device loses synchronization during this period, then the counting results are suspect.
The transition of the LC bit from low to high starts an update cycle. This update cycle has a latency of
three clock periods from the setting of the LC bit from (0) to (1). Therefore, each read by the host requires
a 475ns period (158.43ns x 3 clocks) to retrieve data from the BERT bit count registers.
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