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Download uPD780948 Subseries 8-bit Single
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Chapter 16 CAN Controller 16.1.4 Description of each field (1) "R" indicates recessive level. "D" indicates dominant level. Start of frame: The start of data frame and remote frame are indicated. Figure 16-3: Interframe space on bus idle Data Frame Start of frame Arbitration field R D 1 bit • The start of frame (SOF) is denoted by the falling edge of the bus signal. • Reception continues when 'Dominant level' is detected at the sample point. • The bus becomes idle state when 'Recessive level' is detected at a sample point. (2) Arbitration field: Sets priority, specifies data frame or remote frame, and defines the protocol mode. Figure 16-4: Arbitration Field/Standard Format Mode Arbitration field Control field R D Identifier ID28 . . . ID18 (11 bits) 258 RTR IDE r0 (1 bit) (1 bit) User’s Manual U12670EE3V0UD00
