2K30A

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 “lint563” 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’s performance regarding this issue does not drift over time; that is, it is not a reliability risk. ...