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PIC18F4580-E/ML Datasheet(PDF) 283 Page - Microchip Technology |
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PIC18F4580-E/ML Datasheet(HTML) 283 Page - Microchip Technology |
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283 / 490 page  © 2009 Microchip Technology Inc. DS39637D-page 283 PIC18F2480/2580/4480/4580 REGISTER 24-2: CANSTAT: CAN STATUS REGISTER Mode 0 R-1 R-0 R-0 R-0 R-0 R-0 R-0 U-0 OPMODE2(1) OPMODE1(1) OPMODE0(1) — ICODE3 ICODE2 ICODE1 — Mode 1,2 R-1 R-0 R-0 R-0 R-0 R-0 R-0 R-0 OPMODE2(1) OPMODE1(1) OPMODE0(1) EICODE4 EICODE3 EICODE2 EICODE1 EICODE0 bit 7 bit 0 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 bit 7-5 OPMODE<2:0>: Operation Mode Status bits(1) 111 = Reserved 110 = Reserved 101 = Reserved 100 = Configuration mode 011 = Listen Only mode 010 = Loopback mode 001 = Disable/Sleep mode 000 = Normal mode bit 4 Mode 0: Unimplemented: Read as ‘0’ bit 3-1 ICODE<3:1>: Interrupt Code bits When an interrupt occurs, a prioritized coded interrupt value will be present in these bits. This code indicates the source of the interrupt. By copying ICODE<3:1> to WIN<3:0> (Mode 0) or EICODE<4:0> to EWIN<4:0> (Mode 1 and 2), it is possible to select the correct buffer to map into the Access Bank area. See Example 24-2 for a code example. To simplify the description, the following table lists all five bits. bit 0 Unimplemented: Read as ‘0’ bit 4-0 Mode 1, 2: EICODE<4:0>: Interrupt Code bits See ICODE<3:1> above. Note 1: To achieve maximum power saving and/or able to wake-up on CAN bus activity, switch CAN module in Disable/Sleep mode before putting device to Sleep. 2: If buffer is configured as receiver, EICODE bits will contain ‘10000’ upon interrupt. Mode 0 Mode 1 Mode 2 No interrupt 00000 00000 00000 CAN bus error interrupt 00010 00010 00010 TXB2 interrupt 00100 00100 00100 TXB1 interrupt 00110 00110 00110 TXB0 interrupt 01000 01000 01000 RXB1 interrupt 01010 10001 ----- RXB0 interrupt 01100 10000 10000 Wake-up interrupt 00010 01110 01110 RXB0 interrupt ----- 10000 10000 RXB1 interrupt ----- 10001 10000 RX/TX B0 interrupt ----- 10010 10010(2) RX/TX B1 interrupt ----- 10011 10011(2) RX/TX B2 interrupt ----- 10100 10100(2) RX/TX B3 interrupt ----- 10101 10101(2) RX/TX B4 interrupt ----- 10110 10110(2) RX/TX B5 interrupt ----- 10111 10111(2) |
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