MAP electronics Cocerto-B Especificaciones descargar pdf (Pagina 34)

Usage Notes and Known Design Exceptions to Functional Specifications

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Advisory µDMA: No Transfer Completion Interrupt From SW Channels, Other Than

Channel 30

Revision(s) Affected 0

Details On a Concerto device, if any SW channel, other than Channel 30, is used for data

transfer, then there will be no completion interrupt generated on the µDMA interrupt line

when data transfer is done.

Workaround(s) The user must poll for the STATE field of the DMASTAT register of SW channel, used

for data transfer, to get set to “0x9” to detect completion of data transfer.

This is fixed in Revision A silicon.

Advisory VCU: First CRC Calculation May Not be Correct

Revision(s) Affected 0

Details Due to the internal power-up state of the VCU module, it is possible that the first CRC

result will be incorrect. This applies to the first result from each of the eight CRC

instructions. This condition can only occur after a power-on reset, but will not necessarily

occur on every power on. A warm reset will not cause this condition to reappear.

Workaround(s) The application can reset the internal VCU CRC logic by performing a CRC calculation

of a single byte in the initialization routine. This routine only needs to perform one CRC

calculation and can use any of the CRC instructions. At the end of this routine, clear the

VCU CRC result register to discard the result. An example is shown below.

_VCUcrc_reset

MOVZ XAR7, #0

VCRC8L_1 *XAR7

VCRCCLR

LRETR

This is fixed in Revision A silicon.

F28M35x Concerto™ MCU Silicon Errata SPRZ357J–August 2011–Revised July 2014

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MAP electronics Cocerto-B Especificaciones Pagina 34