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Chapter 18
AFCAN Controller
User’s Manual U16580EE3V1UD00
(d) Data field
The data field contains the amount of data (byte units) set by the control field. Up to 8 units of data
can be set.
Figure 18-9:
Data field
Note:
D: Dominant = 0
R: Recessive = 1
(e) CRC field
The CRC field is a 16-bit field that is used to check for errors in transmit data.
Figure 18-10:
CRC field
Note:
D: Dominant = 0
R: Recessive = 1
•
The polynomial P(X) used to generate the 15-bit CRC sequence is expressed as follows.
P(X) = X
15
+ X
14
+ X
10
+ X
8
+ X
7
+ X
4
+ X
3
+ 1
•
Transmitting node:
Transmits the CRC sequence calculated from the data (before bit
stuffing) in the start of frame, arbitration field, control field, and data
field.
•
Receiving node:
Compares the CRC sequence calculated using data bits that
exclude the stuffing bits in the receive data with the CRC sequence
in the CRC field. If the two CRC sequences do not match, the node
issues an error frame.
R
D
D
a
t
a
0
(
8
b
it
s
)
D
a
t
a
7
(
8
b
it
s
)
M
S
B
→
L
S
B
M
S
B
→
L
S
B
D
a
t
a
field
(CRC field)
(Control field)
R
D
CRC sequence
CRC delimiter
(1 bit)
(15 bits)
CRC field
(ACK field)
(Data field or control field)
Summary of Contents for V850E/PH2
Page 6: ...6 Preface User s Manual U16580EE3V1UD00...
Page 16: ...16 User s Manual U16580EE3V1UD00...
Page 28: ...28 User s Manual U16580EE3V1UD00...
Page 32: ...32 User s Manual U16580EE3V1UD00...
Page 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO...
Page 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO...
Page 192: ...192 Chapter 5 Memory Access Control Function PD70F3187 only User s Manual U16580EE3V1UD00 MEMO...
Page 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO...
Page 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00...
Page 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO...
Page 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00...
Page 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO...
Page 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO...
Page 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO...
Page 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO...
Page 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO...
Page 1052: ...1052 User s Manual U16580EE3V1UD00...
Page 1053: ......