参数资料
型号: MFR4310E1MAE40
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 2 CHANNEL(S), 10M bps, SERIAL COMM CONTROLLER, PQFP64
封装: 10 X 10 MM, 1.40 MM HEIGHT, 0.50 PITCH, LEAD FREE, MS-026BCD, LQFP-64
文件页数: 76/268页
文件大小: 1718K
代理商: MFR4310E1MAE40
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页当前第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页第151页第152页第153页第154页第155页第156页第157页第158页第159页第160页第161页第162页第163页第164页第165页第166页第167页第168页第169页第170页第171页第172页第173页第174页第175页第176页第177页第178页第179页第180页第181页第182页第183页第184页第185页第186页第187页第188页第189页第190页第191页第192页第193页第194页第195页第196页第197页第198页第199页第200页第201页第202页第203页第204页第205页第206页第207页第208页第209页第210页第211页第212页第213页第214页第215页第216页第217页第218页第219页第220页第221页第222页第223页第224页第225页第226页第227页第228页第229页第230页第231页第232页第233页第234页第235页第236页第237页第238页第239页第240页第241页第242页第243页第244页第245页第246页第247页第248页第249页第250页第251页第252页第253页第254页第255页第256页第257页第258页第259页第260页第261页第262页第263页第264页第265页第266页第267页第268页
FlexRay Module (FLEXRAYV4)
MFR4310 Reference Manual, Rev. 1
Freescale Semiconductor
167
3.4.6.3.5
Received Message Access
To access the message data received over the FlexRay bus, the application reads the message data stored
in the message buffer data field of the corresponding receive message buffer. The access to the message
buffer data field is described in Section 3.4.3.1, “Individual Message Buffers”.
The application can read the message buffer data field if the receive message buffer is one of the states
HDis, HDisLck, or HLck. If the message buffer is in one of these states, the FlexRay module does not
change the content of the message buffer.
3.4.6.3.6
Receive Shadow Buffers Concept
The receive shadow buffer concept applies only to individual receive message buffers. The intention of
this concept is to ensure that only syntactically and semantically valid received non-null frames are
presented to the application in a receive message buffer. The basic structure of a receive shadow buffer is
The receive shadow buffers temporarily store the received frame header and message data. After the slot
boundary the slot status information is generated. If the slot status information indicates the reception of
the valid non-null frame (see Table 3-100), the FlexRay module writes the slot status into the slot status
field of the receive shadow buffer and exchanges the content of the Message Buffer Index Registers
(MBIDXRn) with the content of the corresponding internal shadow buffer index register. In all other cases,
the FlexRay module writes the slot status into the identified receive message buffer, depending on the slot
status and the FlexRay segment the message buffer is assigned to.
The shadow buffer concept, with its index exchange, results in the fact that the FRM located message
buffer associated to an individual receive message buffer changes after successful reception of a valid
frame. This means that the message buffer area in the FRM accessed by the application for reading the
received message is different from the initial setting of the message buffer. Therefore, the application must
not rely on the index information written initially into the Message Buffer Index Registers (MBIDXRn).
Instead, the index of the message buffer header field must be fetched from the Message Buffer Index
3.4.6.4
Double Transmit Message Buffer
The section provides a detailed description of the functionality of the double transmit message buffers.
Double transmit message buffers are used by the application to provide the FlexRay module with the
message data to be transmitted over the FlexRay Bus. The FlexRay module uses this message buffer to
provide information to the application about the transmission process, and status information about the slot
in which message data was transmitted.
In contrast to the single transmit message buffers, the application can provide new transmission data while
the transmission of the previously provided message data is running. This scheme is called double
buffering and can be considered as a FIFO of depth 2.
Double transmit message buffers are implemented by combining two individual message buffers that form
the two sides of an double transmit message buffer. One side is called the commit side and is accessed by
the application to provide the message data. The other side is called the transmit side and is used by the
相关PDF资料
PDF描述
MG064S14A300RP TVS DIODE
MG052S14A300RP TVS DIODE
MG052S18A400RP TVS DIODE
MG042S05X150RP TVS DIODE
MII-350GP 32-BIT, 300 MHz, MICROPROCESSOR, CPGA296
相关代理商/技术参数
参数描述
MFR4310FRDC 功能描述:子卡和OEM板 FLXRAY MFR4300 EVB RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit
MFR4-330KFI 制造商:TT Electronics / Welwyn 功能描述:RESISTOR METAL FILM 330KOHM 500mW 1% 制造商:TT Electronics / Welwyn 功能描述:RESISTOR, METAL FILM, 330KOHM, 500mW, 1% 制造商:TT Electronics / Welwyn 功能描述:RESISTOR, METAL FILM, 330KOHM, 500mW, 1%; Product Range:WELWYN - MFR Series Metal Film Resistors; Resistance:330kohm; Power Rating:500mW; Resistance Tolerance: 1%; Resistor Case Style:Axial Leaded; Resistor Element Type:Metal Film ;RoHS Compliant: Yes
MFR4-330RFC 制造商:TT Electronics / Welwyn 功能描述:Res Metal Film 330 Ohm 1% 1/2W ±50ppm/°C Conformal AXL Thru-Hole Ammo Pack
MFR4-330RFI 制造商:TT Electronics / Welwyn 功能描述:RESISTOR METAL FILM 330 OHM 500mW 1% 制造商:TT Electronics / Welwyn 功能描述:RESISTOR, METAL FILM, 330 OHM, 500mW, 1% 制造商:TT Electronics / Welwyn 功能描述:RESISTOR, METAL FILM, 330 OHM, 500mW, 1%; Product Range:WELWYN - MFR Series Metal Film Resistors; Resistance:330ohm; Power Rating:500mW; Resistance Tolerance: 1%; Resistor Case Style:Axial Leaded; Resistor Element Type:Metal Film ;RoHS Compliant: Yes
MFR4-33KFI 制造商:TT Electronics / Welwyn 功能描述:RESISTOR METAL FILM 33KOHM 500mW 1% 制造商:TT Electronics / Welwyn 功能描述:RESISTOR, METAL FILM, 33KOHM, 500mW, 1% 制造商:TT Electronics / Welwyn 功能描述:RESISTOR, METAL FILM, 33KOHM, 500mW, 1%; Product Range:WELWYN - MFR Series Metal Film Resistors; Resistance:33kohm; Power Rating:500mW; Resistance Tolerance: 1%; Resistor Case Style:Axial Leaded; Resistor Element Type:Metal Film ;RoHS Compliant: Yes