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UPD70F3201 Datasheet(PDF) 49 Page - NEC |
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UPD70F3201 Datasheet(HTML) 49 Page - NEC |
49 / 98 page ![]() Preliminary Product Information U15436EJ1V0PM 49 µµµµPD703201, 703201Y, 703204, 703204Y, 70F3201, 70F3201Y, 70F3204, 70F3204Y 15. DMA FUNCTION The DMA function has the following features. Transfer unit: 8 bits/16 bits Maximum transfer count: 65,536 (2 16) times Transfer type: 2-cycle transfer Transfer mode: Single transfer Transfer request: Request via interrupt from on-chip peripheral I/O or external pins, request via software trigger Transfer object: On-chip peripheral I/O, internal RAM, external memory The relationship between the transfer type and transfer object is shown below ( √: Transfer enabled, ×: Transfer disabled). Transfer Destination Transfer Source On-Chip Peripheral I/O Internal RAM External Memory On-chip peripheral I/O √√ √ Internal RAM √× √ External memory √√ √ The following figure shows the configuration of the DMA function. V850ES core CPU BCU IRIF Data control block Address control block Count control block Channel control block Internal RAM On-chip peripheral I/O On-chip peripheral I/O bus DSAnH/ DSAnL DDAnH/ DDAnL DBCn DCHCn DADCn External I/O External bus External RAM External ROM INTDMAn DMARQn DMACTVn DMAC Remark n = 0 to 3 |
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