參數資料
| 型號： | DS21FT44N+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 64/117頁 |
| 文件大小： | 0K |
| 描述： | IC FRAMER 4X4 16CH 300-BGA |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 40 |
| 控制器類型： | E1 調幀器 |
| 接口： | 并行/串行 |
| 電源電壓： | 2.97 V ~ 3.63 V |
| 電流 - 電源： | 225mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 300-BBGA |
| 供應商設備封裝： | 300-PBGA（27x27） |
| 包裝： | 管件 |
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DS21FT44/DS21FF44
50 of 117
IMR2: INTERRUPT MASK REGISTER 2 (Address = 17 Hex)
(MSB)
(LSB)
RMF
RAF
TMF
SEC
TAF
LOTC
RCMF
TSLIP
SYMBOL
POSITION
NAME AND DESCRIPTION
RMF
IMR2.7
Receive CAS Multiframe
0 = interrupt masked
1 = interrupt enabled
RAF
IMR2.6
Receive Align Frame
0 = interrupt masked
1 = interrupt enabled
TMF
IMR2.5
Transmit Multiframe
0 = interrupt masked
1 = interrupt enabled
SEC
IMR2.4
One Second Timer
0 = interrupt masked
1 = interrupt enabled
TAF
IMR2.3
Transmit Align Frame
0 = interrupt masked
1 = interrupt enabled
LOTC
IMR2.2
Loss Of Transmit Clock
0 = interrupt masked
1 = interrupt enabled
RCMF
IMR2.1
Receive CRC4 Multiframe
0 = interrupt masked
1 = interrupt enabled
TSLIP
IMR2.0
Transmit Side Elastic Store Slip Occurrence
0 = interrupt masked
1 = interrupt enabled
12.
ERROR COUNT REGISTERS
There are a set of four counters in each framer that record bipolar or code violations, errors in the CRC4
SMF code words, E bits as reported by the far end, and word errors in the FAS. Each of these four
counters are automatically updated on either one second boundaries (CCR2.7=0) or every 62.5ms
(CCR2.7=1) as determined by the timer in Status Register 2 (SR2.4). Hence, these registers contain
performance data from either the previous second or the previous 62.5ms. The user can use the interrupt
from the one-second timer to determine when to read these registers. The user has a full second (or 62.5
ms) to read the counters before the data is lost. All four counters will saturate at their respective
maximum counts and they will not rollover.
BPV or Code Violation Counter
Violation Count Register 1 (VCR1) is the most significant word and VCR2 is the least significant word of
a 16-bit counter that records either BiPolar Violations (BPVs) or Code Violations (CVs). If CCR2.6 = 0,
then the VCR counts bipolar violations. Bipolar violations are defined as consecutive marks of the same
polarity. In this mode, if the HDB3 mode is set for the receive side by CCR1.2, then HDB3 code words
are not counted as BPVs. If CCR2.6 = 1, then the VCR counts code violations as defined in ITU O.161.
Code violations are defined as consecutive bipolar violations of the same polarity. In most applications,
the framer should be programmed to count BPVs when receiving AMI code and to count CVs when
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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS21FT44N+ | 功能描述:網絡控制器與處理器 IC 4x4 16/4x3 12 Chnl E1/E1 Framer RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21Q348 | 功能描述:網絡控制器與處理器 IC RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21Q348B | 功能描述:網絡控制器與處理器 IC RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21Q348DK | 功能描述:網絡開發(fā)工具 RoHS:否 制造商:Rabbit Semiconductor 產品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評估:RCM6600W 數據速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
| DS21Q348N | 功能描述:網絡控制器與處理器 IC RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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