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H8/3028F Datasheet(PDF) 253 Page - Renesas Technology Corp |
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H8/3028F Datasheet(HTML) 253 Page - Renesas Technology Corp |
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253 / 923 page  Rev. 2.00, 09/03, page 223 of 890 If M (1 to 255) is the size of the block transferred at each request and N (1 to 65,536) is the number of blocks to be transferred, then ETCRAH and ETCRAL should initially be set to M and ETCRB should initially be set to N. Figure 7.10 illustrates how block transfer mode operates. In this figure, bit TMS is cleared to 0, meaning the block area is the destination. T B Transfer Legend L L M N T B T B Address T M bytes or words are transferred per request Address B A A Block 1 Block N B B Block area Block 2 = initial setting of MARA = initial setting of MARB = initial setting of ETCRAH and ETCRAL = initial setting of ETCRB = L = L + SAIDE • (–1) • (2 • M – 1) = L = L + DAIDE • (–1) • (2 • M – 1) A A B B A B A A B B SAID DAID DTSZ DTSZ Figure 7.10 Operation in Block Transfer Mode |
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