參數(shù)資料
型號(hào)： MC33742
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
元件分類： CAN
英文描述： System Basis Chip (SBC) with Enhanced High-Speed CAN Transceiver(帶增強(qiáng)型高速CAN收發(fā)器的系統(tǒng)基片)
中文描述： 系統(tǒng)基礎(chǔ)芯片的增強(qiáng)型（SBC）的高速CAN收發(fā)器（帶增強(qiáng)型高速的CAN收發(fā)器的系統(tǒng)基片）
文件頁(yè)數(shù)： 29/52頁(yè)
文件大小： 1087K
代理商： MC33742
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
33742
29
CAN BUS MODULE DESCRIPTION
Introduction
The 33742 features a high-speed CAN physical interface for
bus communication between 60 kbps up to 1.0 Mbps.
Figure 16
below is a simplified block diagram of the CAN interface of the
33742.
Figure 16. Simplified Block Diagram of CAN Interface
CAN Interface Supply
The supply voltage for the CAN driver is the V2 terminal. The
CAN interface has also a supply path from the battery line,
through the V
SUP
terminal. 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 terminal.
During CAN low power mode, the current is sourced from the
V
SUP
terminal.
Main Operation Modes Description
The CAN interface of the 33742 has two main operation
modes: TXRX and Sleep mode. The modes are controlled by
the CAN SPI Register. In the TXRX mode, which is used for
communication, four different slew rates are available for the
user. In the Sleep mode, the user has the option of enabling or
disabling the remote CAN wake-up capability.
CAN Driver Operation in TXRX Mode
When the CAN interface of the 33742 is in TXRX mode, the
driver has two states: recessive or dominant. The driver state is
controlled by the TXD terminal. The bus state is reported
through the RXD terminal.
When TXD is HIGH, the driver is set in recessive state, and
CANH and CANL lines are biased to the voltage set at V2
divided by 2, or approximately. 2.5 V.
When TXD is LOW, the bus is set into dominant state: CAN L
and CANH drivers are active. CANL is pulled to ground, and
CANH is pulled HIGH toward 5.0 V (voltage at V2).
The RXD terminal reports the bus state: CANH minus CANL
voltage is compared versus an internal threshold (a few
hundred millivolts). If CANH minus CANL is below the
threshold, the bus is recessive and RXD is set HIGH. If CANH
minus CANL is above the threshold, the bus is dominant and
RXD is set LOW. This is illustrated in
Figure 16
, page 29.
V2
Bus Termination (60
)
CANH Line
CANL Line
TXD
RXD
Differential
Receiver
Driver
Driver
2.5 V
Wake-Up
Pattern
Recognition
Wake-Up
Receiver
Internal
Wake-Up
Signal
V
SUP
CANH
CANL
SPI Control
SPI Control
SPI control
V2
V2
V2
V2
QH
QL
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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MC33742DW 功能描述:網(wǎng)絡(luò)控制器與處理器 IC SBC-E-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
MC33742DWR2 功能描述:網(wǎng)絡(luò)控制器與處理器 IC SBC-E-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
MC33742EP 功能描述:CAN 接口集成電路 SBC_ECAN_HS RoHS:否 制造商:Texas Instruments 類型:Transceivers 工作電源電壓:5 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:SOIC-8 封裝:Tube
MC33742EPR2 功能描述:CAN 接口集成電路 SBC_ECAN_HS RoHS:否 制造商:Texas Instruments 類型:Transceivers 工作電源電壓:5 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:SOIC-8 封裝:Tube
MC33742PEG 功能描述:CAN 接口集成電路 SBC-E-HS-CAN RoHS:否 制造商:Texas Instruments 類型:Transceivers 工作電源電壓:5 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:SOIC-8 封裝:Tube
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