MikroElektronika PIC Microcontrollers PIC18 Manuale Utente Scaricare il pdf (Pagina 16)

built-in CAN module. The microcontroller is connected to the CAN bus using an

external MCP2515 CAN controller chip and an MCP2551 CAN bus transceiver chip.

This configuration is suitable for a quick upgrade to an existing design using any PIC

microcontroller.

For new CAN bus–based designs it is easier to use a PIC microcontroller with a built-in

CAN module. As shown in Figure 9.12, such devices include built-in CAN controller

hardware on the chip. All that is required to make a CAN node is to add a CAN

transceiver chip. Table 9.2 lists some of the PIC microcontrollers that include a CAN

module.

CAN Node

CAN Bus

CAN

Transceiver

MCP2551

PIC18F

Series 8-bit

Microcontroller

CAN controller

module

Figure 9.12: CAN node with integrated CAN module

Table 9.2: Some popular PIC microcontrollers that include CAN modules

Device Pins

Flash

(KB)

SRAM

(KB)

EEPROM

(bytes) A/D

CAN

module SPI UART

18F258 28 16 768 256 5 1 1 1

18F2580 28 32 1536 256 8 1 1 1

18F2680 28 64 3328 1024 8 1 1 1

18F4480 40/44 16 768 256 11 1 1 1

18F8585 80 48 3328 1024 16 1 1 1

18F8680 80 64 3328 1024 16 1 1 1

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