參數(shù)資料
型號： ML9620GAZ210
廠商： OKI ELECTRIC INDUSTRY CO LTD
元件分類： 微控制器/微處理器
英文描述： 1 CHANNEL(S), 1M bps, LOCAL AREA NETWORK CONTROLLER, PQFP44
封裝： 0.80 MM PITCH, PLASTIC, QFP-44
文件頁數(shù)： 29/79頁
文件大?。?/td> 449K
代理商： ML9620GAZ210
ML9620 User’s Manual
Chapter 2
Register Descriptions
2 – 18
MXtd
Mask Exteded Identifier
0
The extended identifier bit (IDE) has no effect on the acceptance filtering
1
The extended identifier bit (IDE) is used for acceptance filtering.
Note
When 11-bit (‘standard’) Identifiers are used for a Message Object, the identifiers of received Data Frames are
written into bits ID[28:18]. For acceptance filtering, only these bits together with mask bits Msk[28:18] are
considered.
Dir
Message Direction
0
Direction = receive :
On TxRqst, a Remote Frame with the identifier of this Message Object is
transmitted.
On reception of a Data Frame with matching identifier, that
message is stored in this Message Object.
1
Direction = transmit :
On TxRqst, the respective Message Object is transmitted as a Data Frame. On
reception of a Remote Frame with matching identifier, the TxRqst bit of this
Message Object is set (if RmtEn = ‘1’).
MDir Mask Message Direction
The Arbitration Registers ID[28:0], Xtd, and Dir are used to define the identifier and type of
outgoing messages and are used (together with the mask registers Msk[28:0], MXtd, and MDir)
for acceptance filtering of incoming messages.
A received message is stored into the valid
Message Object with matching identifier and Direction= receive (Data Frame) or Direction=
transmit(Remote Frame).
Extended frames can be stored only in Message Objects with Xtd = ‘1’,
standard frames in Message Objects with Xtd = ‘0’.
If a received message (Data Frame or Remote
Frame) matches with more than one valid Message Object, it is stored into that with the lowest
message number.
For details see chapter 3.3.3 Acceptance Filtering of Received Messages.
0
The message direction bit (Dir) has no effect on the acceptance filtering.
1
The message direction bit (Dir) is used for acceptance filtering.
EoB
End of Buffer
0
Message Object belongs to a FIFO Buffer and is not the last Message Object of
that FIFO Buffer.
1
Single Message Object or last Message Object of a FIFO Buffer.
NewDat
New Data
0
No new data has been written into the data portion of this Message Object by the
Message Handler since last time this flag was cleared by the MCU.
1
The Message Handler or the MCU has written new data into the data portion of
this Message Object.
MsgLst
Message Lost (onry valid for Message Objects with direction = receive)
0
No message lost since last time this bit was reset by the MCU.
1
The Message Handler stored a new message into this object when NewDat was
still set, the MCU has lost a message.
RxIE
Receive Interrupt Enable
0
IntPnd will be left unchanged after a successful reception of a frame.
1
IntPnd will be set after a successful reception of a frame.
An interrupt will be
generated while the IE bit is ‘1’.
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