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參數(shù)資料
| 型號： | MCZ33889BEG |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)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CAN接口 |
| 文件頁數(shù)： | 32/60頁 |
| 文件大?。?/td> | 705K |
| 代理商： | MCZ33889BEG |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
32
33889
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Open wire detection operation:
Description:
The CANH and CANL open wire failures are not described
in the ISO document. Open wire is only diagnostic
information, as no CAN driver or receiver state will change in
case of an open wire condition.
In case one of the CAN wires are open, the communication
will continue through the remaining wire. In this situation the
MC33889 will receive information on one wire only and the
consequences are as follows:
when the bus is set in dominant:
- The differential receiver will toggle
- Only one of the single ended receivers CANH or of CANL
will toggle
The following figure illustrates the CAN signal during
normal communication and in the example of a CANH open
wire. The single ended receiver is sampled at the differential
receiver switching event, in a window of 1
μ
s.
Bus failure
identification
Description
Consequence on CAN driver
Consequence on Rx pin
no failure
default operation: CAN H and CANL driver active,
RTH and RTL termination switched ON
default operation: Report differential
receiver output
1
CANH open wire
default operation
default operation
5
CANH shorted to gnd
default operation
default operation
8, 3a
CANH shorted to Vdd
(5V)
CANH driver turn OFF. RTH termination switched
OFF
Rx report CANL single ended receiver
3
CANH shorted to Vbat
CANH driver turn OFF. RTH termination switched
OFF
Rx report CANL single ended receiver
2
CANL open wire
default operation
default operation
4, 7
CANL shorted to gnd or
CANL shorted to CANH
CANL driver is OFF. RTL termination switched
OFF
Rx report CANH single ended receiver
9
CANL shorted to Vdd (5V)
CANL driver is ON. RTL termination active
default operation
6
CANL shorted to Vbat
CANL driver is OFF. RTL termination switched
OFF
Rx report CANH single ended receiver
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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: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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