upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 652
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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
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Chapter 19
652
No.
<1>
<2>
<3>
<4>
<5>
Name
Error flag 1
Error flag 2
Error delimiter
Error bit
Interframe space/
overload frame
Figure 19-15
Table 19-7
19.2.4 Error frame
R
D
Note
(<4>)
An error frame is output by a node that has detected an error.
Error frame
D: Dominant = 0
R: Recessive = 1
Definition of error frame fields
Preliminary User’s Manual U17566EE1V2UM00
6 bits
<1>
Bit
count
6
0 to 6
8
–
–
Error frame
0 to 6 bits
<2>
Definition
Error active node:
Error passive node:
If another node outputs a dominant level while one node is outputting
a passive error flag, the passive error flag is not cleared until the
same level is detected 6 bits in a row.
Nodes receiving error flag 1 detect bit stuff errors and issues this
error flag.
Outputs 8 recessive-level bits consecutively.
If a dominant level is detected at the 8th bit, an overload frame is
transmitted from the next bit.
The bit at which the error was detected.
The error flag is output from the bit next to the error bit.
In the case of a CRC error, this bit is output following the ACK
delimiter.
An interframe space or overload frame starts from here.
8 bits
<3>
(<5>)
Interframe space or overload frame
Error delimiter
Error flag 2
Error flag 1
Error bit
Outputs 6 dominant-level bits consecutively.
Outputs 6 recessive-level bits consecutively.
CAN Controller (CAN)
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