upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 655
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upd70f3422gj-gae-qs-ax
Manufacturer Part Number
upd70f3422gj-gae-qs-ax
Description
32-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD70F3422GJ-GAE-QS-AX.pdf
(930 pages)
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CAN Controller (CAN)
Type
Bit error
Stuff
error
CRC
error
Form
error
ACK
error
Table 19-11
Detection method
Comparison of the output
level and level on the bus
(except stuff bit)
Check of the receive data
at the stuff bit
Comparison of the CRC
sequence generated from
the receive data and the
received CRC sequence
Field/frame check of the
fixed format
Check of the ACK slot by
the transmitting node
19.3.3 Multi masters
19.3.4 Multi cast
19.3.5 CAN sleep mode/CAN stop mode function
19.3.6 Error control function
(1)
As the bus priority (a node acquiring transmit functions) is determined by the
identifier, any node can be the bus master.
Although there is one transmitting node, two or more nodes can receive the
same data at the same time because the same identifier can be set to two or
more nodes.
The CAN sleep mode/CAN stop mode function puts the CAN Controller in
waiting mode to achieve low power consumption.
The controller is woken up from the CAN sleep mode by bus operation but it is
not woken up from the CAN stop mode by bus operation (the CAN stop mode
is controlled by CPU access).
Error types
Error types
Description of error
Preliminary User’s Manual U17566EE1V2UM00
Detection
condition
Mismatch of levels
6 consecutive bits of
the same output
level
Mismatch of CRC
Detection of fixed
format violation
Detection of
recessive level in
ACK slot
Transmission/
Reception
Transmitting/
receiving node
Receiving node
Receiving node
Receiving node
Transmitting
node
Detection state
Field/Frame
Bit that is outputting data on
the bus at the start of frame to
end of frame, error frame and
overload frame.
Start of frame to CRC
sequence
CRC field
CRC delimiter
ACK field
End of frame
Error frame
Overload frame
ACK slot
Chapter 19
655
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