M-V850E-IA4 Renesas Electronics America, M-V850E-IA4 Datasheet - Page 662

• Manufacturer Part Number: M-V850E-IA4
• Description: KIT EVAL V850E IA4 UPD70F3186
• Manufacturer: Renesas Electronics America

Specifications of M-V850E-IA4

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

16.4.2 Single-step transfer mode
DMA transfer request signal, transfer is performed again. This operation continues until a terminal count occurs.
DMA request always takes precedence.
made in which a higher priority DMA request is issued. DMA channels 0 and 1 are in the single-step transfer mode.
660
(internal signal)
(internal signal)
(internal signal)
In single-step transfer mode, the DMAC releases the bus at each byte/halfword transfer. If there is a subsequent
When the DMAC has released the bus, if another higher priority DMA transfer request is issued, the higher priority
The following shows an example of a single-step transfer. Figure 16-6 shows an example of single-step transfer
Note The bus is always released.
Note The bus is always released.
DMARQ1
DMARQ0
DMARQ1
CPU CPU CPU DMA1 CPU DMA1 CPU DMA1 CPU DMA1 CPU CPU CPU CPU CPU CPU CPU
CPU CPU CPU DMA1 CPU DMA1 CPU DMA0 CPU DMA0 CPU DMA0 CPU DMA1 CPU DMA1 CPU
CHAPTER 16 DMA FUNCTIONS (DMA CONTROLLER)
Figure 16-5. Single-Step Transfer Example 1
Figure 16-6. Single-Step Transfer Example 2
Note
Note
User’s Manual U16543EJ4V0UD
Note
Note
Note
Note
DMA channel 1 terminal count
Note
DMA channel 0
terminal count
Note
Note
DMA channel 1
terminal count