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參數(shù)資料
| 型號(hào)： | COP885BC |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 8-Bit CMOS ROM Based Microcontrollers with 2k Memory, Comparators, and CAN Interface(8位基于CMOS ROM帶2K存儲(chǔ)器，比較器和CAN接口的微控制器) |
| 中文描述： | 8位的CMOS基于ROM與2K內(nèi)存，比較器和CAN接口（8位基于ROM的帶2K的CMOS存儲(chǔ)器，比較器和CAN微控制器接口的微控制器） |
| 文件頁數(shù)： | 34/57頁 |
| 文件大?。?/td> | 677K |
| 代理商： | COP885BC |
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Frame Formats
(Continued)
The following errors can be detected:
Bit Error
A CAN device that is sending also monitors the bus. If the
monitored bit value is different from the bit value that is sent,
a bit error is detected. The reception of a “dominant” bit in-
stead of a “recessive” bit during the transmission of a pas-
sive error flag, during the stuffed bit stream of the arbitration
field or during the acknowledge slot, is not interpreted as a
bit error.
Stuff error
A stuff error is detected, if the bit level after 6 consecutive bit
times has not changed in a message field that has to be
coded according to the bit stuffing method.
Form Error
A form error is detected, if a fixed frame bit (e.g., CRC delim-
iter, ACK delimiter) does not have the specified value. For a
receiver a “dominant” bit during the last bit of End of Frame
does NOT constitute a form error.
Bit CRC Error
A CRC error is detected if the remainder of the CRC calcula-
tion of a received CRC polynomial is non-zero.
Acknowledgment Error
An acknowledgment error is detected whenever a transmit-
ting node does not get an acknowledgment from any other
node (i.e., when the transmitter does not receive a “domi-
nant” bit during the ACK frame).
The device can be in one of three states with respect to error
handling:
Error active
An error active unit can participate in bus communication
and sends an active (“dominant”) error flag.
Error passive
DS012067-63
module 1 = error active receiver with a local fault at t1
module 2 = error passive transmitter detects bit error at t2
module 3 = error passive receiver detects stuff error at t2
FIGURE 28. Error Frame—Error Passive Transmitter
DS012067-64
FIGURE 29. Order of Bit Transmission within a CAN Frame
C
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
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| COP885BC-XXX/WM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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| COP888CFMHD-1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| COP888CFMHD-3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| COP888CFMHEL-1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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