參數(shù)資料
型號: HC05V7GRS
英文描述: 68HC05V7 General Release Specification
中文描述: 68HC05V7一般版本規(guī)范
文件頁數(shù): 116/170頁
文件大小: 980K
代理商: HC05V7GRS
MOTOROLA
Page 102
SECTION 15: MESSAGE DATA LINK CONTROLLER
MC68HC05V7 Specification Rev. 1.0
The Rx Buffer will then be released back to the MDLC. If another message is available in
the second Rx Buffer at this time, the new message will then be made available to the CPU.
Following a write to the MRSR to release the Rx Buffer, this register should not be
accessed again until the RXMS bit is again verified to be set. This procedure will ensure
that the MRSR value does not change while it is being accessed by the CPU.
If, while performing the above operations, another message begins to arrive then the
second message will be placed in a duplicate Rx Buffer. The MDLC will always present the
oldest available message to the programmer, therefore only one Rx Buffer appears in the
memory map while the other one is filled with a newer message.
If both Rx Buffers are filled when a third new message arrives, the third message will be
ignored and the prior messages within the Rx Buffers will not be affected.
F
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