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VR4102 Datasheet(PDF) 279 Page - NEC |
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VR4102 Datasheet(HTML) 279 Page - NEC |
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279 / 701 page  CHAPTER 11 DMAAU (DMA ADDRESS UNIT) 279 11.2.5 FIR DMA Base Address Registers (1) FIRBALREG (0x0B00 0030) Bit D15 D14 D13 D12 D11 D10 D9 D8 Name FIRBA[15] FIRBA[14] FIRBA[13] FIRBA[12] FIRBA[11] FIRBA[10] FIRBA[9] FIRBA[8] R/W R/W R/W R/W R/W R/W R/W R/W R/W RTCRST 1 1 1 1 1 0 0 0 Other resets 1 1 1 1 1 0 0 0 Bit D7 D6D5 D4D3D2 D1 D0 Name FIRBA[7] FIRBA[6] FIRBA[5] FIRBA[4] FIRBA[3] FIRBA[2] FIRBA[1] FIRBA[0] R/W R/W R/W R/W R/W R/W R/W R/W R/W RTCRST 0 0 0 0 0 0 0 0 Other resets 0 0 0 0 0 0 0 0 Bit Name Function D[15:0] FIRBA[15:0] FIR DMA base address [15:0] (2) FIRBAHREG (0x0B00 0032) Bit D15 D14 D13 D12 D11 D10 D9 D8 Name FIRBA[31] FIRBA[30] FIRBA[29] FIRBA[28] FIRBA[27] FIRBA[26] FIRBA[25] FIRBA[24] R/W R RR RRR R R/W RTCRST 0 0 0 0 0 0 0 1 Other resets 0 0 0 0 0 0 0 1 Bit D7 D6D5 D4D3D2 D1 D0 Name FIRBA[23] FIRBA[22] FIRBA[21] FIRBA[20] FIRBA[19] FIRBA[18] FIRBA[17] FIRBA[16] R/W R/W R/W R/W R/W R/W R/W R/W R/W RTCRST 1 1 1 1 1 1 1 1 Other resets 1 1 1 1 1 1 1 1 Bit Name Function D[15:9] FIRBA[31:25] FIR DMA base address [31:25] Write 0 when writing. 0 is returned after a read. D[8:0] FIRBA[24:16] FIR DMA base address [24:16] FIRBALREG and FIRBAHREG are used to set the base addresses for the FIR DMA channel. The addresses set to this register become DMA start addresses. The FIR DMA channel is retained in DRAM as a 2-Kbyte buffer that starts at the address that is generated by masking the low-order 10 bits of the DMA start address. |
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