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PIC18F2680ISPQTP Datasheet(PDF) 278 Page - Microchip Technology |
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PIC18F2680ISPQTP Datasheet(HTML) 278 Page - Microchip Technology |
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278 / 482 page  PIC18F2585/2680/4585/4680 DS39625C-page 276 Preliminary © 2007 Microchip Technology Inc. REGISTER 23-1: CANCON: CAN CONTROL REGISTER Mode 0 R/W-1 R/W-0 R/W-0 R/S-0 R/W-0 R/W-0 R/W-0 U-0 REQOP2 REQOP1 REQOP0 ABAT WIN2 WIN1 WIN0 — Mode 1 R/W-1 R/W-0 R/W-0 R/S-0 U-0 U-0 U-0 U-0 REQOP2 REQOP1 REQOP0 ABAT — — — — Mode 2 R/W-1 R/W-0 R/W-0 R/S-0 R-0 R-0 R-0 R-0 REQOP2 REQOP1 REQOP0 ABAT FP3 FP2 FP1 FP0 bit 7 bit 0 bit 7-5 REQOP2:REQOP0: Request CAN Operation Mode bits 1xx = Request Configuration mode 011 = Request Listen Only mode 010 = Request Loopback mode 001 = Request Disable mode 000 = Request Normal mode bit 4 ABAT: Abort All Pending Transmissions bit 1 = Abort all pending transmissions (in all transmit buffers) 0 = Transmissions proceeding as normal bit 3-1 Mode 0: WIN2:WIN0: 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 ICODE3:ICODE0 bits can be copied to the WIN3:WIN0 bits to select the correct buffer. See Example 23-2 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 bit 0 Unimplemented: Read as ‘0’ bit 4-0 Mode 1: Unimplemented: Read as ‘0’ Mode 2: FP3:FP0: FIFO Read Pointer bits These bits point to the message buffer to be read. 0111:0000 = Message buffer to be read 1111:1000 = Reserved Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown |
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