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| 型号： | MCP2515DM-PTPLS |
| 厂商： | Microchip Technology |
| 文件页数： | 32/92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... |
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MCP2515
4.5
Message Acceptance Filters and
identifier is compared to the masks and filters to deter-
Masks
The message acceptance filters and masks are used to
determine if a message in the message assembly buf-
fer should be loaded into either of the receive buffers
(see Figure 4-5 ). Once a valid message has been
mine if the message should be loaded into a receive
buffer. The mask essentially determines which bits to
apply the acceptance filters to. If any mask bit is set to
a zero, that bit will automatically be accepted,
regardless of the filter bit.
Filter Bit n
Identifier
received into the MAB, the identifier fields of the mes-
sage are compared to the filter values. If there is a
match, that message will be loaded into the appropriate
receive buffer.
TABLE 4-2:
Mask Bit n
FILTER/MASK TRUTH TABLE
Message
Accept or
Reject bit n
bit
4.5.1
DATA BYTE FILTERING
0
X
X
Accept
When receiving standard data frames (11-bit identifier),
the MCP2515 automatically applies 16 bits of masks
and filters normally associated with extended
identifiers to the first 16 bits of the data field (data bytes
0 and 1 ). Figure 4-4 illustrates how masks and filters
apply to extended and standard data frames.
1
1
1
1
Note:
0
0
1
1
X = don’t care
0
1
0
1
Accept
Reject
Reject
Accept
Data byte filtering reduces the load on the MCU when
implementing Higher Layer Protocols (HLPs) that filter
on the first data byte (e.g., DeviceNet?).
As shown in the receive buffers block diagram
filter mask RXM0) are associated with RXB0. Filters
4.5.2
FILTER MATCHING
RXF2, RXF3, RXF4, RXF5 and mask RXM1 are
associated with RXB1.
The filter masks (see Register 4-14 through
identifier are examined with the filters. A truth table is
shown in Table 4-2 that indicates how each bit in the
FIGURE 4-4:
MASKS AND FILTERS APPLY TO CAN FRAMES
Extended Frame
ID10
ID0 EID17
Masks and Filters apply to the entire 29-bit ID field
Standard Data Frame
EID0
ID10
11-bit ID Standard frame
ID0 *
Data Byte 0
16-bit data filtering *
Data Byte 1
* The two MSb (EID17 and EID16) mask and filter bits are not used.
DS21801G-page 32
? 2003-2012 Microchip Technology Inc.
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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: |
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