AT90CAN128-16AE ATMEL Corporation, AT90CAN128-16AE Datasheet - Page 204

• Manufacturer Part Number: AT90CAN128-16AE
• Description: 8-bit Avr Microcontroller With 128K Bytes of Isp Flash And CAN Controller.flash (Kbytes) 128 Vcc (V) 2.7-5.5 EEPROM (Kbytes) 4 SRAM (bytes) 4K CAN (mess. Obj.) 15
• Manufacturer: ATMEL Corporation

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AT90CAN128
Figure 94. Arbitration Between two Masters
Note that arbitration is not allowed between:
•
•
•
It is the user software’s responsibility to ensure that these illegal arbitration conditions
never occur. This implies that in multi-master systems, all data transfers must use the
same composition of SLA+R/W and data packets. In other words: All transmissions
must contain the same number of data packets, otherwise the result of the arbitration is
undefined.
A REPEATED START condition and a data bit
A STOP condition and a data bit
A REPEATED START and a STOP condition
Synchronized
SCL Line
SDA from
SDA from
Master A
Master B
SDA Line
START
Arbitration, SDA
Master A loses
A
SDA
4250C–CAN–03/04