Note On Dma Transfer; Note On Setting The Work Area; Notes On Stack Area; Note On Address 0 Access - Renesas Emulation Pod M306V2T-RPD-E User Manual

Note on DMA Transfer:

• With this product, the program is stopped with a loop program to a specific address. Therefore, if
a DMA request is generated by a timer or other source while the program is stopped, DMA transfer
is executed. However, make note of the fact that DMA transfer while the program is stopped may
not be performed correctly. Also note that the below registers have been changed to generate DMA
transfer as explained here even when the program is stopped.

Note on Setting the Work Area:

• To use this product, it is necessary to set the work area in the internal reserved area of the MCU.
However, do not set it in the last 10 bytes of the internal reserved area. And be sure to set the internal
reserved area to INTERNAL. (Set the work area by the INIT dialog of emulator debugger M3T-
PD30.)
Example: When debugging the program of the MCU whose internal reserved area is 01800
For instance, when setting the work area at 01800
01809

Notes on Stack Area:

• With this product, a maximum 8 bytes of the user stack is consumed.
• If the user stack does not have enough area, do not use areas which cannot be used as stack (SFR
area, RAM area which stores data, or ROM area) as work area. Using areas like this is a cause of
user program crashes and destabilized emulator control. Therefore, ensure the +8 bytes maximum
capacity used by the user program as the user stack area.

Note on Address 0 Access:

• With the M306V2 and M306V5 MCUs, when a maskable interrupt is generated, the interrupt data
(interrupt No. and interrupt request level) stored in address 0 is read out. Also, the interrupt request
bit is cleared when address 0 is read out. Consequently, when the address 0 readout instruction is
executed or when address 0 is read out in the cause of a program runaway, a malfunction occurs
in that the interrupt is not executed despite the interrupt request, because the request bit of the
highest priority interrupt factor enabled is cleared.
For this malfunction, when the reading out to the 0 address is generated excluding the interrupt, the
yellow LED lights up to alarm. When this LED lights, there is a possibility of wrong access,
therefore check the program. This LED is turned off by the RESET switch of the emulator main
unit.

Note on Stop and Wait Modes:

• Do not perform step execution at addresses in the stop or wait mode. It may cause communication
errors.
IMPORTANT
DMA0 transfer counter register TCR0
DMA1 transfer counter register TCR1
02BFF , set the work area within the range of 01800
16
.
16
, the emulator uses 10 bytes area of 01800
16
( 11 / 72 )
to 02BF6 .
16 16
to
16
to
16