Renesas Technology, Tools FAQs
Last Updated: January 9, 2004
Document Number: 03120507_e
Q.
How can I access an extended memory area from M3T-PD38 using the MCU's EDMA function (*)?
* There are M37640T-RPD-E, M37641T-RPD-E and M37641T2-RPD-E for the MCU having EDMA function.
A.
The following are specific rules for accessing the extended memory area.
When using the emulation memory as the extended memory area:
Set MAP 10000, 1FFFF, INT in M3T-PD38.
However, the emulation memory is permanently assigned addresses 10000 to 1FFFF. Therefore, this does not support
memory assignments in which multiple banks can use the same port.
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When accessing the memory in the User target:
Set MAP 10000, 1FFFF, EXT in M3T-PD38.
When accessing the extended memory area in the M3T-PD38 DUMP or other window, please use the following procedure.
(1) Output the bank value of the bank switching port you want to access.
(2) Access address 1XXXX in the DUMP or other window.
The above procedure executes the access to bank address XXXX.
Normally, the bank switching port is modified in the program. However, it is necessary to output the bank to the port before
accessing data in the DUMP or other window, as described in (1) above.
* The EMDA enable bit is automatically set to "enabled" when address 10000 or higher is accessed.
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