CHAPTER 11 FCAN CONTROLLER
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User’s Manual U14492EJ3V0UD
<2> Arbitration field
The arbitration field is used to set the priority, data frame or remote frame, and protocol mode.
This field includes an identifier, frame setting (RTR bit), and protocol mode setting bit.
Figure 11-10. Arbitration Field (In Standard Format Mode)
R
D
IDE
(r1)
r0
RTR
Identifier
Arbitration field
(Control field)
(11 bits)
ID28 · · · · · · · · · · · · · · · · · · · · ID18
(1 bit)
(1 bit)
Figure 11-11. Arbitration Field (In Extended Format Mode)
R
D
r1
r0
RTR
IDE
SRR
Identifier
Note
Identifier
Arbitration field
(Control field)
(11 bits)
(18 bits)
ID28 · · · · · · · · · · · · · · ID18
ID17 · · · · · · · · · · · · · · · · · ID0
(1 bit) (1 bit)
(1 bit)
Note
Setting the higher 7 bits of the identifier as 1111111B is prohibited.
Cautions 1. ID28 to ID0 are identifier bits.
2. Identifier bits are transferred in MSB-first order.
Table 11-4. RTR Bit Settings
Frame Type
RTR Bit
Data frame
Dominant
Remote frame
Recessive
Table 11-5. Protocol Mode Setting and Number of Identifier (ID) Bits
Protocol Mode
SRR Bit
IDE Bit
No. of Bits
Standard format mode
None
Dominant (D)
11 bits
Extended format mode
Recessive (R)
Recessive (R)
29 bits
Содержание V850E/IA1 mPD703116
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