Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Standard CAN frame
| Question | Answer |
|---|---|
| What are the parts of a standard CAN frame? | SOF, Arbitration Field, Control Field, Data Field, CRC Field, ACK Field, EOF, IFS |
| How many bits does the SOF have? | 1 bit |
| What is the SOF and its value? | Start Of Frame, 1 bit → Always dominant (0) |
| What is the purpose of SOF? | Indicates the start of the frame transmission |
| What does the Arbitration Field contain? | Identifier + RTR |
| How many bits is the Identifier in standard CAN? | 11 bits |
| What is the purpose of the Identifier? | Defines message priority (lower value = higher priority) |
| What is the RTR bit and its default value in data frame? | Remote Transmission Request → 0 (dominant) for Data Frame, 1 (recessive) for Remote Frame |
| How many bits does RTR have? | 1 bit |
| What does RTR indicate? | 0 = Data frame, 1 = Remote frame |
| How many bits are in the Arbitration Field? | 12 bits (11 ID + 1 RTR) |
| What does the Control Field contain? | IDE + r0 + DLC |
| How many bits does the Control Field have? | 6 bits |
| What is the IDE bit? | Identifier Extension (0 = standard frame, 1 = extended frame) |
| How many bits does IDE have? | 1 bit |
| What is the r0 bit? | Reserved bit (always dominant = 0) |
| How many bits does r0 have? | 1 bit |
| What is DLC? | Data Length Code |
| How many bits does DLC have? | 4 bits |
| What does DLC indicate? | Number of data bytes (0 to 8 bytes) |
| How many bytes can the Data Field have? | 0 to 8 bytes |
| How many bits can the Data Field have? | 0 to 64 bits |
| What is the purpose of the Data Field? | Contains the payload (actual information) |
| What does the CRC Field contain? | CRC + CRC delimiter |
| How many bits does the CRC have? | 15 bits |
| How many bits does the CRC delimiter have? What is the CRC delimiter default value? | 1 bit, Always recessive (1) |
| What is the purpose of CRC? | Error detection |
| How many bits does the CRC Field have in total? | 16 bits |
| What does the ACK Field contain? | ACK slot + ACK delimiter |
| How many bits does the ACK slot have?What is the ACK delimiter default value? | 1 bit, Always recessive (1) |
| What is the purpose of ACK? | Confirms that at least one node received the frame correctly |
| How many bits does the ACK Field have? | 2 bits |
| How many bits does EOF have?What is the default value of EOF bits? | 7 bits, All recessive (1) |
| What does EOF mean? | End Of Frame |
| What is the purpose of EOF? | Indicates the end of the frame |
| What is IFS? | Inter Frame Space |
| How many bits does IFS have?and value? | 3 bits → all recessive (1) |
| What is the purpose of IFS? | Provides separation between frames |
| What is the total size of a standard CAN frame? | Approximately 47 to 111 bits (depending on data length) |
| What types of CAN frames exist? | Data frame, Remote frame, Error frame, Overload frame |
| How does arbitration work in CAN? | The message with the lowest ID wins |
| What are dominant and recessive bits? | 0 = dominant, 1 = recessive |
| What happens during arbitration? | Nodes transmit simultaneously; dominant (0) overwrites recessive (1) |
| What is the default bus level when idle? | Recessive (1) |
| Where does bit stuffing apply? | From SOF to CRC field |
| What happens if a node detects an error? | Sends an Error Frame (dominant bits) |
| What is the main difference between Standard and Extended CAN? | Identifier length → Standard: 11 bits, Extended: 29 bits |
| What does the Arbitration Field contain (Extended)? | 11-bit base ID + SRR + IDE + 18-bit extension + RTR |
| What is SRR in Extended frame? | Substitute Remote Request → always recessive (1) |
| What is the IDE bit in Extended frame? | 1 (recessive) → indicates extended format |
Created by:
yizuztineo