參數資料
型號: MCP2515-E/P
廠商: Microchip Technology
文件頁數: 9/88頁
文件大?。?/td> 0K
描述: IC CAN CONTROLLER W/SPI 18DIP
標準包裝: 25
控制器類型: CAN 接口
接口: SPI 串行
電源電壓: 2.7 V ~ 5.5 V
電流 - 電源: 10mA
工作溫度: -40°C ~ 125°C
安裝類型: 通孔
封裝/外殼: 18-DIP(0.300",7.62mm)
供應商設備封裝: 18-PDIP
包裝: 管件
配用: MCP2515DM-BM-ND - BOARD DEMO FOR MCP2515/51
MCP2515DM-PTPLS-ND - BOARD DAUGHTER PICTAIL MCP2515
MCP2515DM-PCTL-ND - BOARD DEMO FOR MCP2515
DV251001-ND - KIT DEVELOPMENT CAN MCP2510
2010 Microchip Technology Inc.
DS21801F-page 17
MCP2515
FIGURE 3-1:
TRANSMIT MESSAGE FLOWCHART
Start
Is
CAN bus available
to start transmission?
No
Examine TXBnCTRL.TXP <1:0> to
Are any
TXBnCTRL.TXREQ
?
bits = 1
The message transmission
sequence begins when the
device determines that the
TXBnCTRL.TXREQ for any of
the transmit registers has been
set.
Clear:
TXBnCTRL.ABTF
TXBnCTRL.MLOA
TXBnCTRL.TXERR
Yes
is
TXBnCTRL.TXREQ=0
or CANCTRL.ABAT=1
Clearing the TxBnCTRL.TXREQ bit
while it is set, or setting the CAN-
CTRL.ABAT bit before the message
has started transmission, will abort
the message.
No
Transmit Message
Was
Message Transmitted
Successfully?
No
Yes
Clear TxBnCTRL.TXREQ
CANINTE.TXnIE=1?
Generate
Interrupt
Yes
Message
Yes
Set
TxBnCTRL.TXERR
Lost
Determine Highest Priority Message
No
?
Set
TxBNCTRL.MLOA
The CANINTE.TXnIE bit
determines if an interrupt
should be generated when
a message is successfully
transmitted.
GOTO START
CANTINF.TXnIF
Yes
No
Message error
or
Lost arbitration
Arbitration
Error
CANINTE.MEERE?
No
Generate
Interrupt
Yes
Set
CANTINF.MERRF
?
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