Hi,
I have a few questions regarding using the TI OMAP GPMC and SDMA
together with an external device.
Question 01: How can I set up the multiplexing modes for the TI OMAP
3503 GPMC and SDMA controller ? The GPMC has 4 multiplexing options/
modes and the SDMA has 8 modes of operation. Which of these modes will
enable me to use them together?
If you look at the TI document SPRS505C OMAP3515/03 Applications
Processor (Rev C), page 70, it shows that there are 8 modes available
for multiplexing.
I'm trying to interface the TI OMAP3503 to an external device. I want
to use the GPMC and SDMA to interface with the external device.
The SDMA will interface with the external device using the
sys_ndmareq[3:0] signals. See TI document SPRUF98B OMAP35x Technical
Reference Manual (Rev. B), page 1076 for a diagram.
Now the GPMC itself has 4 multiplexing options. See TI document
SPRUF98B OMAP35x Technical Reference Manual (Rev. B), page 1182 which
shows the table.
Question 02: Which mode should I use to get the GPMC and the SDMA to
work together to interface with the external device (FPGA)?
Question 03: Is it possible to use all GPMC to get 26-bits for the
address and 16-bits of data in address/data multiplexed mode, and use
the SDMA connected at the same time to the external device?
Best regards,
Elvis
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