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H8SX1663 数据表(PDF) 378 Page - Renesas Technology Corp |
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H8SX1663 数据表(HTML) 378 Page - Renesas Technology Corp |
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378 / 1158 page ![]() Section 7 DMA Controller (DMAC) Rev.1.00 Jun. 07, 2006 Page 326 of 1102 REJ09B0294-0100 7.3.5 DMA Block Size Register (DBSR) DBSR specifies the repeat size or block size. DBSR is enabled in repeat transfer mode and block transfer mode and is disabled in normal transfer mode. 31 BKSZH31 0 R/W 30 BKSZH30 0 R/W 29 BKSZH29 0 R/W 28 BKSZH28 0 R/W 27 BKSZH27 0 R/W 24 BKSZH24 0 R/W 26 BKSZH26 0 R/W 25 BKSZH25 0 R/W Bit Bit Name Initial Value R/W 23 BKSZH23 0 R/W 22 BKSZH22 0 R/W 21 BKSZH21 0 R/W 20 BKSZH20 0 R/W 19 BKSZH19 0 R/W 16 BKSZH16 0 R/W 18 BKSZH18 0 R/W 17 BKSZH17 0 R/W Bit Bit Name Initial Value R/W 15 BKSZ15 0 R/W 14 BKSZ14 0 R/W 13 BKSZ13 0 R/W 12 BKSZ12 0 R/W 11 BKSZ11 0 R/W 8 BKSZ8 0 R/W 10 BKSZ10 0 R/W 9 BKSZ9 0 R/W Bit Bit Name Initial Value R/W 7 BKSZ7 0 R/W 6 BKSZ6 0 R/W 5 BKSZ5 0 R/W 4 BKSZ4 0 R/W 3 BKSZ3 0 R/W 0 BKSZ0 0 R/W 2 BKSZ2 0 R/W 1 BKSZ1 0 R/W Bit Bit Name Initial Value R/W Bit Bit Name Initial Value R/W Description 31 to 16 BKSZH31 to BKSZH16 Undefined R/W Specify the repeat size or block size. When H'0001 is set, the repeat or block size is one byte, one word, or one longword. When H'0000 is set, it means the maximum value (refer to table 7.1). While the DMA is in operation, the setting is fixed. 15 to 0 BKSZ15 to BKSZ0 Undefined R/W Indicate the remaining repeat or block size while the DMA is in operation. The value is decremented by 1 every time data is transferred. When the remaining size becomes 0, the value of the BKSZH bits is loaded. Set the same value as the BKSZH bits. |
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