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HC05V7GRS/D Scheda tecnica(PDF) 116 Page - NXP Semiconductors

Il numero della parte HC05V7GRS/D
Spiegazioni elettronici  Low cost, HC05 Core
PDF  170 Pages
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Produttore elettronici  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo NXP - NXP Semiconductors

HC05V7GRS/D Scheda tecnica(HTML) 116 Page - NXP Semiconductors

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SECTION 15: MESSAGE DATA LINK CONTROLLER
Page 102
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.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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