AT90CAN32 Atmel Corporation, AT90CAN32 Datasheet - Page 249

• Manufacturer Part Number: AT90CAN32
• Manufacturer: Atmel Corporation

Specifications of AT90CAN32

• Flash (kbytes): 32 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Can: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

19.7.3
19.8
19.8.1
7679H–CAN–08/08
Interrupts
Error Setting
Interrupt organization
Figure 19-13. 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.
Tx
Rx
• 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
Stuff error
ACK error
CRC error
Bit error
Bit error
SOF
Identifier
Arbitration
RTR
Control
Message Data
AT90CAN32/64/128
CRC
CRC
del.
ACK
ACK
del.
EOF
inter.
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