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Motore di ricerca datesheet componenti elettronici |
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H8S/2214 Scheda tecnica(PDF) 251 Page - Renesas Technology Corp |
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H8S/2214 Scheda tecnica(HTML) 251 Page - Renesas Technology Corp |
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251 / 936 page  Section 7 DMA Controller Rev.4.00 Sep. 18, 2008 Page 191 of 872 REJ09B0189-0400 7.3 Register Descriptions (2) (Full Address Mode) Full address mode transfer is performed with channels A and B together. For details of full address mode setting, see table 7.5. 7.3.1 Memory Address Register (MAR) Bit : 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 MAR : — — — — — — — — Initial value : 0 0 0 0 0 0 0 0 * * * * * * * * R/W : — — — — — — — — R/W R/W R/W R/W R/W R/W R/W R/W Bit : 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 MAR : Initial value : * * * * * * * * * * * * * * * * R/W : R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W *: Undefined MAR is a 32-bit readable/writable register; MARA functions as the transfer source address register, and MARB as the destination address register. MAR is composed of two 16-bit registers, MARH and MARL. The upper 8 bits of MARH are reserved: they are always read as 0, and cannot be modified. MAR is incremented or decremented each time a byte or word transfer is executed, so that the source or destination memory address can be updated automatically. For details, see section 7.3.4, DMA Control Register (DMACR). MAR is not initialized by a reset or in standby mode. 7.3.2 I/O Address Register (IOAR) IOAR is not used in full address transfer. |
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