sja1000t-n1 NXP Semiconductors, sja1000t-n1 Datasheet - Page 37
sja1000t-n1
Manufacturer Part Number
sja1000t-n1
Description
Stand-alone Can Controller
Manufacturer
NXP Semiconductors
Datasheet
1.SJA1000T-N1.pdf
(68 pages)
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Philips Semiconductors
Table 21 Bit interpretation of bits ECC.4 to ECC.0; note 1
Note
1. Bit settings reflect the current frame segment to distinguish between different error events.
If a bus error occurs, the corresponding bus error interrupt
is always forced, if enabled. At the same time, the current
position of the bit stream processor is captured into the
error code capture register. The content within this register
is fixed until the users software has read out its content
once. The capture mechanism is then activated again.
The corresponding interrupt flag located in the interrupt
register is cleared during the read access to the interrupt
register. A new bus error interrupt is not possible until the
capture register is read out once.
2000 Jan 04
BIT ECC.4 BIT ECC.3 BIT ECC.2 BIT ECC.1 BIT ECC.0
Stand-alone CAN controller
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
1
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
0
1
1
1
1
1
0
0
1
1
1
0
0
0
1
1
0
0
0
1
1
1
0
1
1
1
0
1
0
0
0
1
1
1
0
0
1
1
1
0
0
0
1
1
0
0
1
0
1
1
0
37
6.4.10
The error warning limit can be defined within this register.
The default value (after hardware reset) is 96. In reset
mode this register appears to the CPU as a read/write
memory. In operating mode it is read only.
Note, that a content change of the EWLR is only possible,
if the reset mode was entered previously. An error status
change (see status register; Table 14) and an error
warning interrupt forced by the new register content will not
occur until the reset mode is cancelled again.
start of frame
ID.28 to ID.21
ID.20 to ID.18
bit SRTR
bit IDE
ID.17 to ID.13
ID.12 to ID.5
ID.4 to ID.0
bit RTR
reserved bit 1
reserved bit 0
data length code
data field
CRC sequence
CRC delimiter
acknowledge slot
acknowledge delimiter
end of frame
intermission
active error flag
passive error flag
tolerate dominant bits
error delimiter
overload flag
E
RROR
W
ARNING
FUNCTION
L
IMIT
R
EGISTER
Product specification
SJA1000
(EWLR)
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