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DSP56301CE2K30A Datasheet

  • DSP56301CE2K30A

  • DSP56301 Digital Signal Processor

  • 21頁(yè)

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Freescale Semiconductor, Inc.
Chip Errata
DSP56301 Digital Signal Processor
Mask: 2K30A
General remark: In order to prevent the use of instructions or sequences of instructions that
do not operate correctly, we encourage you to use the 鈥渓int563鈥?program to identify such
cases and use alternative sequences of instructions. This program is available as part of the
Motorola DSP Tools CLAS package.
Freescale Semiconductor, Inc...
Silicon Errata
Errata
Number
Errata Description
Description (added 8/16/2001):
Some K30A devices shipped under an XC part number are subject to a problem
if operated in DMA mode 5. The problem occurs if two consecutive host
commands are sent to the DSP. The second host command is received, the
corresponding answer message is composed, and the DMA channel is set up
correctly to transmit the message to the host. However, the message is never sent.
The host port status register shows a host transmit data request (bit HTRQ in
HSTR is set.) DTDn is never set, indicating there has been no terminated
transfer. Sequences of: 1. data, 2. host command to terminate the transfer, and
3. acknowledgement from the host work properly and can be repeated as often
as needed. If a second host command is sent to the DSP, without first sending
data, the DMA channel locks up. This problem has proven to be low level to
date, occurring at a rate of about 350 ppm. The product鈥檚 performance regarding
this issue does not drift over time; that is, it is not a reliability risk.
The problem can also be manifested in other modes when more than one DMA
channel is operating, with two or more channels moving data while one is
servicing the PCI FIFO. In this case, the channel servicing the PCI FIFO stalls
and the PCI bus enters an endless state of retries.
Applies
to Mask
2K30A
ES133
Motorola Semiconductor Products Sector
301CE2K30A_0_8
6501 William Cannon Drive West, Austin, Texas 78735-8598
This Product,
For More Information On
Go to: www.freescale.com
ng 12/19/02 pg. 1
餂?/div>
1996-2002 Motorola

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