MCP2515DM-BM Microchip Technology, MCP2515DM-BM Datasheet - Page 17

• Manufacturer Part Number: MCP2515DM-BM
• Description: BOARD DEMO FOR MCP2515/51
• Manufacturer: Microchip Technology
• Series: PICtail™r

Specifications of MCP2515DM-BM

• Main Purpose: Interface, CAN Controller
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP2515, MCP2551
• Primary Attributes: Stand alone CAN Controller with SPI
• Silicon Manufacturer: Microchip
• Silicon Core Number: MCP2515, MCP2551
• Features: Two Identical Boards And A CAN Cable For Creating A Small CAN Bus, CAN Bus PC Software
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

FIGURE 3-1:
© 2010 Microchip Technology Inc.
The CANINTE.TXnIE bit
determines if an interrupt
should be generated when
a message is successfully
transmitted.
Generate
Interrupt
TRANSMIT MESSAGE FLOWCHART
Determine Highest Priority Message
Examine TXBnCTRL.TXP <1:0> to
No
Yes
Clear TxBnCTRL.TXREQ
to start transmission?
Message Transmitted
CANINTE.TXnIE=1?
TXBnCTRL.TXREQ
Clear:
TXBnCTRL.ABTF
TXBnCTRL.MLOA
TXBnCTRL.TXERR
CAN bus available
Transmit Message
CANTINF.TXnIF
GOTO START
Successfully?
Yes
Are any
bits = 1
Start
Was
Set
Is
?
Yes
No
Yes
No
No
The message transmission
sequence begins when the
device determines that the
TXBnCTRL.TXREQ for any of
the transmit registers has been
set.
Lost
Arbitration
TxB
Lost arbitration
Message error
N
TXBnCTRL.TXREQ=0
or CANCTRL.ABAT=1
CTRL.MLOA
Set
or
?
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.
is
?
Yes
Message
Error
CANINTE.MEERE?
TxBnCTRL.TXERR
CANTINF.MERRF
No
No
Set
Set
MCP2515
DS21801F-page 17
Generate
Yes
Interrupt