参数资料
型号: MCP2515-E/PG
元件分类: 微控制器/微处理器
英文描述: 1 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PDIP18
封装: 0.300 INCH, LEAD FREE, PLASTIC, DIP-18
文件页数: 45/88页
文件大小: 1205K
代理商: MCP2515-E/PG
2010 Microchip Technology Inc.
DS21801F-page 5
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:
CAN BUFFERS AND PROTOCOL ENGINE BLOCK DIAGRAM
Acceptance Filter
RXF2
R
X
B
1
Identifier
Data Field
Identifier
Acceptance Mask
RXM1
Acceptance Filter
RXF3
Acceptance Filter
RXF4
Acceptance Filter
RXF5
M
A
B
Acceptance Filter
RXF0
Acceptance Filter
RXF1
R
X
B
0
TXR
E
Q
TXB2
AB
TF
ML
O
A
TXE
R
ME
SS
AGE
Message
Queue
Control
Transmit Byte Sequencer
TXR
E
Q
TXB0
AB
TF
ML
O
A
TXE
R
ME
SS
AGE
CRC<14:0>
Comparator
Receive<7:0>
Transmit<7:0>
Receive
Error
Transmit
Error
Protocol
REC
TEC
ErrPas
BusOff
Finite
State
Machine
Counter
Shift<14:0>
{Transmit<5:0>, Receive<8:0>}
Transmit
Logic
Bit
Timing
Logic
TX
RX
Configuration
Registers
Clock
Generator
PROTOCOL
ENGINE
BUFFERS
TXR
E
Q
TXB1
AB
TF
ML
O
A
TXE
R
ME
SS
AGE
Acceptance Mask
RXM0
A
c
e
p
t
A
c
e
p
t
SOF
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