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参数资料
| 型号： | DS2282 |
| 英文描述： | T1 FDL Controller/Monitor Stik |
| 中文描述： | T1 FDL控制器/监视器条 |
| 文件页数： | 13/22页 |
| 文件大小： | 192K |
| 代理商： | DS2282 |
DS2282
022798 13/22
OOFCR: Out Of Frame Count Register (82)
.
A
16–bit register that records Out Of Frame (OOF) error
events. An OOF error event occurs whenever 2 or more
framing bits out of 6 in the FPS are incorrect. An OOF
error event will cause the DS2282 to resynchronize to
the incoming data stream.
Receive PRM Operation
The DS2282 decodes the incoming FDL for scheduled
Performance Report Messages (PRM). It automatically
detects opening flags, deletes any stuffed zero bits that
may be present, and it calculates CRC–16 on all the
data between the opening and closing flags. The
DS2282 normally only decodes the current second’s
data (octets 5 and 6). Data from the previous three se-
conds is “bumped” from PRMR0 to PRMR1 to PRMR2
to PRMR3 and finally out of available recall range. If the
PRM is received in error (CRC check sum is incorrect),
the message will be ignored. The DS2282 will keep
track of errored PRMs and properly place the unerrored
message when it is received. For example, if a PRM is
received that does not correspond to its CRC check
sum, then PRMR0 will be set to all zeros indicating that
an invalid message was received. If the next scheduled
message is received correctly, then the data missed in
the last scheduled message will be updated to PRMR1.
NOTE: PRMR0 to PRMR3 are only updated if PRMs
are received; if no valid or invalid PRMs are received,
then both the SE and FE bits in PRMR0 to PRMR3 will
be set to one.
PRMR0: PRM Register 0 (10)
PRMR1: PRM Register 1 (11)
PRMR2: PRM Register 2 (12)
PRMR3: PRM Register 3 (13)
PLB
SL
LV
SE
FE
CRC2
CRC1
CRC0
(LSB)
(MSB)
PLB
SL
LV
SE
Payload Loopback Activated
Controlled Slip (slip
Line Violation (BPV
Severely Errored Framing Event (2 of 6
OOF
1)
Frame Sync Bit Error Event
See Table Below
See Table Below
See Table Below
1)
1)
FE
CRC2
CRC1
CRC0
CRC2
CRC1
CRC0
EVENT
0
0
0
Invalid
0
0
1
CRC=0
0
1
0
CRC=1 (G1)
0
1
1
1
CRC
5 (G2)
1
0
0
5
CRC
10 (G3)
1
0
1
10
CRC
100 (G4)
1
1
0
100
CRC
319 (G5)
1
1
1
CRC
320 (G6)
PRM History Registers
There are three registers that keep track of the sched-
uled PRM and collect data on the receive performance
of the remote end. The first two of these registers
(PRMESR and PRMSESR) mock the monitor registers
in the type of data that they report. ES and SES are cal-
culated off of the received PRM data. The PRM data is
pulled from PRMR3 since it has the highest probability
of containing valid data. If PRMR3 does not contain val-
id data, then ES and SES are not calculated. The third
register (PRMER) keeps a count of how many PRMs
have been received in error.
PRMESR: PRM Errored Seconds Register
(1C)
.
A 16–bit register that counts Errored Seconds
(ES). An ES is any one second time interval with either a
frame bit error (FE or SE=1) or CRC–6 error (G1 to
G6=1).
PRMSESR: PRM Severely Errored Seconds
Register (1D)
.
A 16–bit register that counts Severely
Errored Seconds (SES). A SES is any one second time
interval with an OOF error event (SE=1) or more than
320 CRC–6 error events (G6=1).
PRMER: PRM Error Register (1E)
.
An 8–bit reg-
ister that records the number of PRMs that have been
received in error. A PRM is considered to be received in
error when the calculated CRC does not match the in-
coming CRC word.
Transmit PRM Operation
The DS2282 will automatically generate PRMs once a
second to be included into the FDL for transmission to
the remote end. It automatically pulls together all the
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2282/87-22282-000 | 功能描述:网络控制器与处理器 IC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| DS2282-113 | 功能描述:IC CTRLR/MON STIK T1 FDL 30-PIN RoHS:否 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:4,900 系列:- 控制器类型:USB 2.0 控制器 接口:串行 电源电压:3 V ~ 3.6 V 电流 - 电源:135mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:36-VFQFN 裸露焊盘 供应商设备封装:36-QFN（6x6） 包装:* 其它名称:Q6396337A |
| DS2286-8 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| DS2287-32 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| DS2287-8 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
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