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)： 19/74頁
文件大?。?/td> 487K
代理商： MSM9225GA-2K
Semiconductor
MSM9225
26/73
11. CAN status register (CANS: 9Fhex)
This is a status register to indicate the status of CAN.
Bit6 to bit4 are flags for the transmitter and bit1 and bit0 are for the receiver, and this register
is read only.
The bit configuration is shown below.
(1) Receiver Error Warning: REW
When the Receiver Error Counter (REC)
≥ 96, REW becomes "1". If REW = "1", the bus
may be seriously damaged. The bus must be tested for this condition.
At reset or when REC < 96, REW becomes "0".
(2) Receiver Error Passive: REP
When the Receive Error Counter (REC)
≥ 128, REP becomes "1".
At reset or when REC < 128, REP becomes "0" (error active)
(3) Transmitter Error Warning: TEW
When the Transmit Error Counter (TEC)
≥ 96, TEW becomes "1".
If TEW = "1", the bus may be seriously damaged. The bus must be tested for this
condition.
At reset or when TEC < 96, TEW becomes "0".
(4) Transmitter Error Passive: TEP
When the Transmit Error Counter (TEC) > 128, TEP becomes "1".
At reset or when TEP < 128, TEP becomes "0".
(5) Bus OFF: BOFF
This flag indicates the CAN bus status.
When the Transmit Error Counter (TEC) > 256 BOFF becomes "1" and the CAN bus is in
the BUS OFF state.
At reset or when TEP < 256, BOFF becomes "0".
76543210
Address MSB
9Fh
LSB
REW : Receiver Error Warning
REP : Receiver Error Passive
Not used
TEW : Transmitter Error Warning
TEP : Transmitter Error Passive
BOFF : Bus OFF flag
Not used
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