CAN-100 Fujitsu Semiconductor America Inc, CAN-100 Datasheet - Page 90

• Manufacturer Part Number: CAN-100
• Description: BOARD EVAL RS232 100QFP
• Manufacturer: Fujitsu Semiconductor America Inc
• Series: FRr
• Type: MCUr

Specifications of CAN-100

• Contents: Board, BLDC Motor, Cables, Power Supply
• For Use With/related Products: MB91F267N
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 865-1102

CAN error management is defined in its protocol. Five types of error detection and three types of status
are used.
5.2.3
1. Error detection
2. Statuses
As shown in “Table 5-1 Description of the error types”, errors that can be detected depends on
whether the node is transmitting or receiving.
Bit error
ACK error
Stuff error
CRC error
Format error
Each node has error counters whose value depends on the status. The error counters of the nodes
are named TEC (transmit error count) and REC (receive error count) intending transmission and
reception. The three statuses are as described below.
Error active
Error passive
Bus off
Error type
Error management
Status
The node is normally joining in the bus.
The node has frequent errors so it is influencing the bus.
The node is disconnected from the bus. To restore to the bus, the bus needs to
satisfy the restoration condition.
Table 5-1 Description of the error types
Transmitting
node
○
○
-
-
-
Receiving
- 90 -
node
○
○
○
-
-
Detected if there is a difference between the
transmitted data and the bus level.
Detected
transmission cannot be obtained.
Detected if bit stuffing is not applied. Bit
stuffing is to set an inverted bit by 5 bits if
the number of successive bits with the same
level is 5 or more. This prevents bits with the
same level from being successive over 6 bits.
Detected if CRC (cyclic redundancy check)
fails on the received data.
Detected if the received data does not
confirm to any of the frame formats.
Description
if
an
Description
acknowledgement
AN07-00180-3E
to