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RL78/D1A User's Manual: Hardware - Renesas

RL78/D1A User's Manual: Hardware - Renesas

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Under development<br />

Preliminary document<br />

Specifications in this document are tentative and subject to change.<br />

<strong>RL78</strong>/<strong>D1A</strong> CHAPTER 14 CAN CONTROLLER<br />

Arbitration field<br />

The arbitration field is used to set the priority, data frame/remote frame, and frame format.<br />

R<br />

D<br />

R<br />

D<br />

Figure 14-6. Arbitration Field (in Standard Format Mode)<br />

Arbitration field (Control field)<br />

Identifier<br />

ID28 · · · · · · · · · · · · · · · · · · · · ID18<br />

RTR IDE<br />

(r1)<br />

(11 bits)<br />

(1 bit) (1 bit)<br />

Cautions 1. ID28 to ID18 are identifiers.<br />

2. An identifier is transmitted MSB first.<br />

Remark D: Dominant = 0<br />

R: Recessive = 1<br />

Figure 14-7. Arbitration Field (in Extended Format Mode)<br />

Identifier SRR IDE<br />

Identifier<br />

R01UH0317EJ0004 Rev. 0.04 789<br />

Feb. 22, 2013<br />

r0<br />

Arbitration field (Control field)<br />

RTR<br />

ID28 · · · · · · · · · · · · · · ID18 ID17 · · · · · · · · · · · · · · · · · ID0<br />

(11 bits) (1 bit) (1 bit) (18 bits) (1 bit)<br />

Cautions 1. ID28 to ID18 are identifiers.<br />

2. An identifier is transmitted MSB first.<br />

Remark D: Dominant = 0<br />

R: Recessive = 1<br />

Table 14-3. RTR Frame Settings<br />

Frame Type RTR Bit<br />

Data frame 0 (D)<br />

Remote frame 1 (R)<br />

r1 r0<br />

Table 14-4. Frame Format Setting (IDE Bit) and Number of Identifier (ID) Bits<br />

Frame Format SRR Bit IDE Bit Number. of Bits<br />

Standard format mode None 0 (D) 11 bits<br />

Extended format mode 1 (R) 1 (R) 29 bits

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