atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 182
atmega32c1
Manufacturer Part Number
atmega32c1
Description
Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATMEGA32C1.pdf
(366 pages)
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16.7.3
16.8
16.8.1
182
Interrupts
ATmega32/64/M1/C1
Error Setting
Interrupt organization
Figure 16-13. Error Detection Procedures in a Data Frame
The CAN channel can detect some errors on the CAN network.
After detecting an error, the CAN channel sends an error frame on network. If the CAN channel
detects an error frame on network, it sends its own error frame.
The different interrupts are:
The general interrupt enable is provided by ENIT bit and the specific interrupt enable for CAN
timer overrun is provided by ENORVT bit.
Rx
Tx
• AERR: Acknowledgment error (Tx only). No detection of the dominant bit in the acknowledge
• In transmission:
• In reception:
• Interrupt on receive completed OK,
• Interrupt on transmit completed OK,
• Interrupt on error (bit error, stuff error, CRC error, form error, acknowledge error),
• Interrupt on frame buffer full,
• Interrupt on “Bus Off” setting,
• Interrupt on overrun of CAN timer.
slot.
The error is set at MOb level.
- The identified has matched:
- The identified has not or not yet matched:
The error is set at general level.
The error is set at MOb level.
– end-of-frame
– error delimiter
– overload delimiter
Form error
Form error
Stuff error
ACK error
Stuff error
CRC error
Bit error
Bit error
SOF
Identifier
Arbitration
RTR
Control
Message Data
CRC
CRC
del.
ACK
ACK
del.
7647A–AVR–02/08
EOF
inter.
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