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參數(shù)資料
| 型號(hào)： | MCZ33889BEG |
| 廠(chǎng)商： | 飛思卡爾半導(dǎo)體(中國(guó))有限公司 |
| 英文描述： | System Basis Chip with Low Speed Fault Tolerant CAN Interface |
| 中文描述： | 系統(tǒng)基礎(chǔ)芯片與低速容錯(cuò)CAN接口 |
| 文件頁(yè)數(shù)： | 33/60頁(yè) |
| 文件大小： | 705K |
| 代理商： | MCZ33889BEG |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
33
33889
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Figure 13. CAN Normal Signal Communication and CAN Open Wire
Figure 14. Open Wire Detection Principle
Open wire detection, MC33889B and D:
Failure detection:
The device will detect a difference in toggling counts
between the differential receiver and one of the single ended
receivers. Every time a difference in count is detected a
counter is incremented. When the counter reaches 4, the
device detects and reports an open wire condition.
The open
wire detection is performed only when the device
receives a message and not when it send message.
Open wire recovery:
When the open wire failure has recovered, the difference
in count is reduced and the device detects the open wire
recovery.
MC33889B:
When detection is complete, the counter is no longer
incremented. It can only be decremented by sampling of the
dominant level on the S-H (S-L) (recovery pulse). When it
reaches zero, the failure has recovered.
CANH
CANL
Diff
S-L
S-H
-3.2V
Rec
Dom
Rec
Sampling point
CANH
CANL
Diff
S-L
S-H
-3.2V
Rec
Dom
Rec
Sampling point
Sampling recessive level
= > open wire “detection pulse”
1us
(No open wire, or open wire recovery)
(CAN H open wire)
Sampling dominant level
= > no failure or “recovery pulse”
Diff
CANH
CANL
S-H
1us
Sampling
Dom
Rec
S-L
1us
Sampling
CANH counter
L-open
L-counter +/-
(count = 4)
recover
(count = 0)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCZ33889BEG | 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN TRANCEIVER |
| MCZ33889BEG/R2 | 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:System Basis Chip with Low Speed Fault Tolerant CAN Interface |
| MCZ33889BEGR2 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC SBC-LITE-LS-CAN RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| MCZ33889DEG | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC SBC-LITE-LS-CAN RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| MCZ33889DEG | 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN TRANCEIVER |
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