R0K572011S000BE Renesas Electronics America, R0K572011S000BE Datasheet - Page 380

• Manufacturer Part Number: R0K572011S000BE
• Description: KIT STARTER FOR SH7201
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572011S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7201
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 11 Direct Memory Access Controller (DMAC)
11.6
11.6.1
Transfer on all channels of the DMAC can be suspended by clearing the DMST bit in the DMA
activation control register (DMSCNT) to "0". Transfer on a specific channel can also be
suspended by clearing the DMA transfer enable bit (DEN) in DMA control register B
(DMCNTBn) for that channel.
If the DMST bit or the corresponding DEN bit is cleared to "0" while single operand transfer or
sequential operand transfer is in progress, transfer is suspended on completion of the current single
operand transfer regardless of the transfer mode (whether transfer is in cycle-stealing or pipelined
mode).
When transfer in the non-stop transfer condition is in progress, DMA transfer is not suspended and
continues to completion (until the byte counter reaches "0") even if the DMST bit or
corresponding DEN bit is cleared to "0".
To restart DMA transfer on a channel for which transfer has been suspended, set (to "1")
whichever of DMST and the corresponding DEN bit has been cleared.
11.6.2
To stop transfer on any channel, suspend transfer on that channel and then initialize the interior
state of the DMAC for that channel by setting the DMAC internal state clear bit (DSCLR) in the
corresponding DMA control register B (DMCNTBn). In this case, only the transfer state of the
DMAC internal circuits is initialized; the registers retain their values.
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Suspending, Restarting, and Stopping of DMA Transfer
Suspending and Restarting DMA Transfer
Stopping DMA Transfer on Any Channel
R01UH0026EJ0300 Rev. 3.00
SH7201 Group
Sep 24, 2010