參數(shù)資料
型號： MSM9225BGA-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： PLASTIC, QFP-44
文件頁數(shù)： 55/95頁
文件大?。?/td> 567K
代理商： MSM9225BGA-2K
MSM9225B User’s Manual
Chapter 3 Operational Description
3 – 4
3.1.4 Message Box Rewrites during Operation
The procedure to rewrite the Identifier (ID) and Data Length Code (DLC) during operation, excluding the time
that initial settings are made for the message boxes, is indicated below. The number of message boxes set in the
NMES register at the initial setting is the number of (valid) message boxes that can be rewritten.
Start rewrite
Set MMA bit of message
control register (x0hex) to 1
Read MMA bit
MMA = 1?
Rewrite
FRM, DLC3-0, ID
B28-0
Reset MMA bit of message
control register to 0
Rewrite complete
YES
NO
All message box
settings complete?
YES
NO
Since the MMA bit cannot be set to 1 while
message boxes are being accessed from
the CAN side, read and verify its value.
Since the MMA bit cannot be
reset to 0 while
message boxes are being accessed from
the CAN side, read and verify its value.
Read MMA bit
MMA = 0?
YES
NO
Figure 3-4 Message Box Rewrite Flowchart
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