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參數(shù)資料
| 型號： | MCZ33989EG |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 元件分類： | CAN |
| 英文描述： | System Basis Chip with High-Speed CAN Transceiver |
| 中文描述： | 系統(tǒng)基礎(chǔ)芯片高高速CAN收發(fā)器 |
| 文件頁數(shù)： | 46/66頁 |
| 文件大?。?/td> | 1181K |
| 代理商： | MCZ33989EG |
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Analog Integrated Circuit Device Data
Freescale Semiconductor
46
33989
TYPICAL APPLICATIONS
SUPPLEMENTAL APPLICATION NOTES
Figure 34. 33989 CAN Interface
CAN Interface Supply
The supply voltage for the CAN driver is the V2 pin. The
CAN interface also has a supply path from the battery line,
through the pin VSUP. This path is used in CAN sleep mode
to allow wake-up detection.
During CAN communication (transmission and reception)
the CAN interface current is sourced from the V2 pin. During
a CAN low power mode, the current is sourced from the
VSUP pin.
Main Operation Modes Description
The CAN interface of the MC33989 has two main
operation modes: Normal mode and sleep mode. The modes
are controlled by the SPI command.
In normal mode, used for communication, four different
slew rates are available for the user.
In sleep mode, the user has the option to enable or disable
the remote CAN wake-up capability.
CAN Driver Operation in Normal Mode
When the CAN interface of the MC33989 is in Normal
mode, the driver has two states: recessive or dominant. The
driver state is controlled by the TX pin. The bus state is
reported through the RX pin.
When TX is high, the driver is set in a recessive state,
CANH and CANL lines are biased to the voltage set at V2
divided by 2, approx. 2.5 V.
When TX is low, the bus is set into dominant state: the
CANL and CANH drivers are active. CANL is pulled to gnd,
CANH is pulled high toward 5 V (the voltage at V2).
The RX pin reports the bus state: the CANH minus the
CANL voltage is compared versus an internal threshold (a
few hundred mV). If “CANH minus CANL” is below the
threshold, the bus is recessive and RX is set high.
If “CANH minus CANL” is above the threshold, the bus is
dominant and RX is set low. This is illustrated in the figure
below.
Figure 35. CAN Driver Operation in Normal Mode
V2
Bus termination (60 ohms)
CANH line
CAN L line
TX
RX
Differential
receiver
Driver
Driver
2.5V
Wake-up
pattern
recognition
Wake-up
receiver
Internal
wake-up
signal
VSUP
CANH
CANL
SPI control
SPI control
SPI control
V2
V2
V2
V2
QH
QL
CANH
TX
RX
2.5V
CANH-DOM
CANH-REC
CANL
2.5V
CANL-DOM
CANL-REC
CANH-CANL
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCZ33989EG | 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN TRANCEIVER |
| MCZ33989EGR2 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC SBC-HS 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 |
| MCZ33990EF | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC CLASS B SERIAL TRANS. 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 |
| MCZ33990EF | 制造商:Freescale Semiconductor 功能描述:TRANCEIVER J-1850 CLASS B 8SOIC |
| MCZ33990EF/R2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Enhanced Class B Serial Transceiver |
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