PIC18F4580ISOSQTP 查看數據表（PDF） - Microchip Technology

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PIC18F4580ISOSQTP

28/40/44-Pin Enhanced Flash Microcontrollers with ECAN™ Technology, 10-Bit A/D and nanoWatt Technology

Microchip Technology 

PIC18F2480/2580/4480/4580

REGISTER 24-1: CANCON: CAN CONTROL REGISTER

R/W-1

R/W-0

R/W-0

R/S-0

R/W-0

R/W-0

R/W-0

U-0

Mode 0

REQOP2 REQOP1 REQOP0 ABAT

WIN2

WIN1

WIN0

—

R/W-1

R/W-0

R/W-0

R/S-0

U0

U-0

U-0

U-0

Mode 1

REQOP2 REQOP1 REQOP0 ABAT

—

—

—

—

R/W-1

R/W-0

R/W-0

R/S-0

R-0

R-0

R-0

Mode 2

REQOP2 REQOP1 REQOP0 ABAT

FP3

FP2

FP1

bit 7

R-0

FP0

bit 0

Legend:

R = Readable bit

-n = Value at POR

S = Settable bit

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-5

bit 4

bit 3-1

bit 0

bit 4-0

REQOP<2:0>: Request CAN Operation Mode bits

1xx = Request Configuration mode

011 = Request Listen Only mode

010 = Request Loopback mode

001 = Disabled/Sleep mode

000 = Request Normal mode

ABAT: Abort All Pending Transmissions bit

1 = Abort all pending transmissions (in all transmit buffers)(1)

0 = Transmissions proceeding as normal

Mode 0:

WIN<2:0>: Window Address bits

These bits select which of the CAN buffers to switch into the Access Bank area. This allows access to the

buffer registers from any data memory bank. After a frame has caused an interrupt, the ICODE<3:0> bits

can be copied to the WIN<2:0> bits to select the correct buffer. See Example 24-2 for a code example.

111 = Receive Buffer 0

110 = Receive Buffer 0

101 = Receive Buffer 1

100 = Transmit Buffer 0

011 = Transmit Buffer 1

010 = Transmit Buffer 2

001 = Receive Buffer 0

000 = Receive Buffer 0

Unimplemented: Read as ‘0’

Mode 1:

Unimplemented: Read as ‘0’

Mode 2:

FP<3:0>: FIFO Read Pointer bits

These bits point to the message buffer to be read.

0000 = Receive Message Buffer 0

0001 = Receive Message Buffer 1

0010 = Receive Message Buffer 2

0011 = Receive Message Buffer 3

0100 = Receive Message Buffer 4

0101 = Receive Message Buffer 5

0110 = Receive Message Buffer 6

0111 = Receive Message Buffer 7

1000:1111 Reserved

Note 1: This bit will clear when all transmissions are aborted.

DS39637D-page 282

© 2009 Microchip Technology Inc.

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