upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 339
upd70f3017ay
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upd70f3017ay
Description
V850/sa1tm 32-/16-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD70F3017AY.pdf
(492 pages)
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also operates during the bus hold period and after access to external memory.
12.6 Cautions
DMA operation stops only in the IDLE/software STOP mode. In the HALT mode, DMA operation continues, DMA
• To manipulate the bits of the interrupt control register (xxICn) in the EI state when using the DMA function,
• If an interrupt request signal is generated in synchronization with the external clock, setting the interrupt request
Remark
execute the DI instruction before manipulation and EI instruction after manipulation. Alternatively, clear (0) the
xxIFn bit at the start of the interrupt servicing routine (when not using the DMA function, these manipulations are
not required).
signal as multiple DMA transfer triggers is prohibited. If set, the priority of the DMA may be reversed.
Figure 12-5. Processing When Transfer Requests DMA0 to DMA2 Are Generated Simultaneously
xx: Peripheral unit identification name (see Table 5-2)
N: Peripheral unit number (see Table 5-2)
CPU
processing
Transfer requests DMA0 to DMA2 are
generated simultaneously
DMA0
processing
CHAPTER 12 DMA FUNCTIONS
CPU
processing
User’s Manual U12768EJ4V1UD
DMA1
processing
CPU
processing
DMA2
processing
CPU
processing
339
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