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MCP2515
1.4
Transmit/Receive Buffers/Masks/
Filters
The MCP2515 has three transmit and two receive
buffers, two acceptance masks (one for each receive
buffer) and a total of six acceptance filters. Figure 1-3
shows a block diagram of these buffers and their
connection to the protocol engine.
FIGURE 1-3:
BUFFERS
CAN BUFFERS AND PROTOCOL ENGINE BLOCK DIAGRAM
Acceptance Mask
RXM1
Acceptance Filter
RXF2
TXB0
TXB1
TXB2
A
c
Acceptance Mask
RXM0
Acceptance Filter
RXF3
A
c
c
c
e
p
t
Acceptance Filter
RXF0
Acceptance Filter
RXF1
Acceptance Filter
RXF4
Acceptance Filter
RXF5
e
p
t
Message
Queue
Control
Transmit Byte Sequencer
R
X
B
0
Identifier
Data Field
M
A
B
Identifier
Data Field
R
X
B
1
PROTOCOL
ENGINE
Receive
Error
Counter
REC
TEC
Transmit<7:0>
Receive<7:0>
Transmit
Error
Counter
ErrPas
BusOff
Shift<14:0>
{Transmit<5:0>, Receive<8:0>}
Comparator
Protocol
Finite
State
SOF
CRC<14:0>
Machine
Transmit
Logic
TX
? 2003-2012 Microchip Technology Inc.
Bit
Timing
Logic
RX
Clock
Generator
Configuration
Registers
DS21801G-page 5
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相关代理商/技术参数
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:
MCP2515-E/ST 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-I 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Stand-Alone CAN Controller with SPI Interface
MCP2515-I/ML 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Stand-Alone CAN Controller with SPI Interface