- 您现在的位置：买卖IC网 > PDF目录1229 > MCP2515DM-PTPLS (Microchip Technology)BOARD DAUGHTER PICTAIL MCP2515 PDF资料下载
参数资料
| 型号： | MCP2515DM-PTPLS |
| 厂商： | Microchip Technology |
| 文件页数： | 23/92页 |
| 文件大小： | 0K |
| 描述： | BOARD DAUGHTER PICTAIL MCP2515 |
| 标准包装： | 1 |
| 系列： | * |
| 主要目的： | 接口，CAN 控制器 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | MCP2515，MCP2551 |
| 主要属性： | 置于 PICtail Plus 子板内的 CAN 控制器和 CAN 收发器 |
| 已供物品： | 板，CD |
| 产品目录页面： | 685 (CN2011-ZH PDF) |
| 相关产品： | MCP2515T-I/ST-ND - IC CAN CONTROLLER W/SPI 20TSSOP MCP2515T-I/SO-ND - IC CAN CONTROLLER W/SPI 18SOIC MCP2515T-E/ST-ND - IC CAN CONTROLLER W/SPI 20TSSOP MCP2515T-E/SO-ND - IC CAN CONTROLLER W/SPI 18SOIC MCP2515-E/ST-ND - IC CAN CONTROLLER W/SPI 20TSSOP MCP2515-E/SO-ND - IC CAN CONTROLLER W/SPI 18SOIC MCP2515-E/P-ND - IC CAN CONTROLLER W/SPI 18DIP MCP2515-I/ST-ND - IC CAN CONTROLLER W/SPI 20TSSOP MCP2515-I/SO-ND - IC CAN CONTROLLER W/SPI 18SOIC MCP2515-I/P-ND - IC CAN CONTROLLER W/SPI 18DIP 更多... |
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页当前第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
MCP2515
4.0
MESSAGE RECEPTION
4.2
Receive Priority
4.1
Receive Message Buffering
RXB0, the higher priority buffer, has one mask and two
message acceptance filters associated with it. The
The MCP2515 includes two full receive buffers with
multiple acceptance filters for each. There is also a
separate Message Assembly Buffer (MAB) that acts as
a third receive buffer (see Figure 4-2 ).
received message is applied to the mask and filters for
RXB0 first.
RXB1 is the lower priority buffer, with one mask and
four acceptance filters associated with it.
4.1.1
MESSAGE ASSEMBLY BUFFER
In addition to the message being applied to the RB0
mask and filters first, the lower number of acceptance
Of the three receive buffers, the MAB is always
committed to receiving the next message from the bus.
The MAB assembles all messages received. These
messages will be transferred to the RXBn buffers (see
filter criteria is met.
filters makes the match on RXB0 more restrictive and
implies a higher priority for that buffer.
When a message is received, bits <3:0> of the
RXBnCTRL register will indicate the acceptance filter
number that enabled reception and whether the
received message is a remote transfer request.
4.1.2
RXB0 AND RXB1
4.2.1
ROLLOVER
The remaining two receive buffers, called RXB0 and
RXB1, can receive a complete message from the
protocol engine via the MAB. The MCU can access one
buffer, while the other buffer is available for message
reception, or for holding a previously received
message.
Additionally, the RXB0CTRL register can be configured
such that, if RXB0 contains a valid message and
another valid message is received, an overflow error
will not occur and the new message will be moved into
RXB1, regardless of the acceptance criteria of RXB1.
Note:
The entire content of the MAB is moved
4.2.2
RXM BITS
into the receive buffer once a message is
accepted. This means, that regardless of
the type of identifier (standard or
extended) and the number of data bytes
received, the entire receive buffer is
overwritten with the MAB contents.
Therefore, the contents of all registers in
the buffer must be assumed to have been
modified when any message is received.
The RXBnCTRL.RXM bits set special receive modes.
Normally, these bits are cleared to 00 to enable
reception of all valid messages as determined by the
appropriate acceptance filters. In this case, the
determination of whether or not to receive standard or
extended messages is determined by the
RFXnSIDL.EXIDE bit in the acceptance filter register.
If the RXBnCTRL.RXM bits are set to 01 or 10 , the
receiver will only accept messages with standard or
4.1.3
RECEIVE FLAGS/INTERRUPTS
extended identifiers, respectively. If an acceptance
filter has the RFXnSIDL.EXIDE bit set such that it does
When a message is moved into either of the receive
buffers, the appropriate CANINTF.RXnIF bit is set. This
bit must be cleared by the MCU in order to allow a new
message to be received into the buffer. This bit
provides a positive lockout to ensure that the MCU has
finished with the message before the MCP2515
attempts to load a new message into the receive buffer.
If the CANINTE.RXnIE bit is set, an interrupt will be
generated on the INT pin to indicate that a valid
message has been received. In addition, the
associated RXnBF pin will drive low if configured as a
? 2003-2012 Microchip Technology Inc.
not correspond with the RXBnCTRL.RXM mode, that
acceptance filter is rendered useless. These two
modes of RXBnCTRL.RXM bits can be used in
systems where it is known that only standard or
extended messages will be on the bus.
If the RXBnCTRL.RXM bits are set to 11 , the buffer will
receive all messages, regardless of the values of the
acceptance filters. Also, if a message has an error
before the EOF, that portion of the message assembled
in the MAB before the error frame will be loaded into the
buffer. This mode has some value in debugging a CAN
system and would not be used in an actual system
environment.
DS21801G-page 23
相关PDF资料 |
PDF描述 |
|---|---|
| MCP3905EV | BOARD DEMO FOR MCP3905 |
| MCP402XEV | BOARD EVAL FOR MCP402X |
| MCP42XXEV | BOARD EVALUATION MCP42XX |
| MCP43XXEV | BOARD EVALUATION MCP43XX |
| MCP46XXDM-PTPLS | BOARD PICTAIL DIGI POT MCP4XXX |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP2515-E | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Stand-Alone CAN Controller with SPI Interface |
| MCP2515-E/ML | 制造商:Microchip Technology Inc 功能描述: |
| MCP2515-E/P | 功能描述:网络控制器与处理器 IC W/ SPI Inter 125dC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| MCP2515-E/SO | 功能描述:网络控制器与处理器 IC W/ SPI Inter 125dC RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| MCP2515-E/SORB4 | 制造商:Microchip Technology Inc 功能描述: |
发布紧急采购，3分钟左右您将得到回复。