DS72030W200FPV Renesas Electronics America, DS72030W200FPV Datasheet - Page 469

Manufacturer Part Number

DS72030W200FPV

MPU, 32BIT, SH7203, ROMLESS, 240QFP

Manufacturer

Renesas Electronics America

Program Memory Size

Digital Ic Case Style

Supply Voltage Range

1.1V To 1.3V

Operating Temperature Range

-20Â°C To +85Â°C

Rohs Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

In burst mode, once the DMAC obtains the bus mastership, it does not release the bus mastership

and continues to perform transfer until the transfer end condition is satisfied. In external request

mode with low level detection of the DREQ pin, however, when the DREQ pin is driven high, the

bus mastership is passed to another bus master after the DMAC transfer request that has already

been accepted ends, even if the transfer end conditions have not been satisfied.

Figure 10.11 shows DMA transfer timing in burst mode.

Table 10.10 shows the relationship between request modes and bus modes by DMA transfer

Table 10.10 Relationship of Request Modes and Bus Modes by DMA Transfer Category

Relationship between Request Modes and Bus Modes by DMA Transfer Category

Transfer Category

External device with DACK and external

External device with DACK and memory-

mapped external device

External memory and external memory

External memory and memory-mapped

external device

Memory-mapped external device and

memory-mapped external device

External memory and on-chip peripheral

Memory-mapped external device and

on-chip peripheral module

Figure 10.11 DMA Transfer Example in Burst Mode

(Dual Address, DREQ Low Level Detection)

DMAC DMAC DMAC DMAC

Section 10 Direct Memory Access Controller (DMAC)

Rev. 3.00 Sep. 28, 2009 Page 437 of 1650

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