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參數(shù)資料
| 型號： | MSM9225GA-2K |
| 廠商： | OKI ELECTRIC INDUSTRY CO LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, LOCAL AREA NETWORK CONTROLLER, PQFP44 |
| 封裝： | 9 X 10 MM, 0.80 MM PITCH, PLASTIC, QFP-44 |
| 文件頁數(shù)： | 52/74頁 |
| 文件大?。?/td> | 487K |
| 代理商： | MSM9225GA-2K |
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Semiconductor
MSM9225
56/73
6. Error control functions
(1) Types of errors
Type of error
Detection method Detection condition Transmit/Receive
Field/Frame
Error description
Detection state
Bits that output data onto the
bus, start-of-frame to end-of-
frame, error frame, and
overload frame
Transmit/Receive
node
Bit error
Comparison of output
level and bus level
(excluding stuff bits)
Both levels do not
match
Start-of-frame to CRC
saquence
Transmit/Receive
node
Stuff error
Verify received data
with the stuff bit
Same level of data for
6 consecutive bits
Start-of-frame to data field
Receive node
CRC error
CRC generated from
received data
compared to received
CRC sequence
CRC's do not match
CRC delimiter
Ack field
End-of-frame
Error frame
Overload frame
Receive node
Form error
Verify fixed format
field/frame
Detection of fixed
format violation
Ack slot
Transmit node
Ack error
Verify Ack slot by
transmit node
Detection of a
"recessive" bit during
Ack slot
(2) Error frame output timing
Type of error
Bit error, stuff error,
form error, Ack error
CRC error
Error frame is output at the next bit after the error is detected.
Error frame is output at the next bit after the Ack delimiter.
Output timing
(3) Procedure when an error is generated
After the error frame, the transmit node retransmits a data frame or a remote frame.
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