Allwinner A20 - Page 790

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 790 / 812
6.16.5.3. CAN STATUS REGISTER
Offset: 0x08
Register Name:
CAN_STA_REG
Default Value: 0x0000_003C
Bit
Read/Write
Default
Description
31:24
/
/
/
23:22
R
0
ERR_CODE
Error Capture Error Code
0 - Bit error
1 - Form error
2 - Stuff error
3 - Some other type of error
21
R
0
ERR_DIR
Error Capture Direction
1 - the error occurred during reception
0 - the error occurred during transmission
20:16
R
0
ERR_SEG_CODE
Error Capture Segment Code
00011 - Start of frame
00010 - ID.28 to ID.21
00110 - ID.20 to ID.18
00100 - SRTR bit
00101 - IDE bit
00111 - ID.17 to ID.13
01111 - ID.12 to ID.5
01110 - ID.4 to ID.0
01100 - RTR bit
01101 - Reserved bit 1
01001 - Reserved bit 0
01011 - Data Length Code
01010 - Data Field
01000 - CRC sequence
11000 - CRC delimiter
11001 - Acknowledge
11011 - Acknowledge delimiter
11010 - End of frame
10010 - Intermission
10001 - Active error flag