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CS5535 датащи(PDF) 260 Page - National Semiconductor (TI) |
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CS5535 датащи(HTML) 260 Page - National Semiconductor (TI) |
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260 / 555 page ![]() www.national.com 260 Revision 0.8 ATAC Register Descriptions (Continued) 5.4.3.3 Bus Master 0 PRD Table Address - Primary (ATAC_BM0_PRD) ATAC I/O Address 04h Type R/W Reset Value 00000000h ATAC_BM0_PRD Register Map 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9876543210 PRD_PNTR RSVD ATAC_BM0_PRD Bit Descriptions Bit Name Description 31:2 PRD_PNTR Pointer to the Physical Region Descriptor Table. This register is a PRD table pointer for IDE Bus Master 0. When written, this register points to the first entry in a PRD table. Once IDE Bus Master 0 is enabled (Command Register bit 0 = 1), it loads the pointer and updates this register to the next PRD by adding 08h. When read, this register points to the next PRD. 1:0 RSVD Reserved. Set to 0. |
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