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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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HD6432138SW Scheda tecnica(PDF) 223 Page - Renesas Technology Corp |
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HD6432138SW Scheda tecnica(HTML) 223 Page - Renesas Technology Corp |
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223 / 1061 page  Section 7 Data Transfer Controller [H8S/2138 Group] Rev. 4.00 Jun 06, 2006 page 169 of 1004 REJ09B0301-0400 7.3 Operation 7.3.1 Overview When activated, the DTC reads register information that is already stored in memory and transfers data on the basis of that register information. After the data transfer, it writes updated register information back to memory. Pre-storage of register information in memory makes it possible to transfer data over any required number of channels. Setting the CHNE bit to 1 makes it possible to perform a number of transfers with a single activation. Figure 7.2 shows a flowchart of DTC operation. Start Read DTC vector Next transfer Read register information Data transfer Write register information Clear activation flag CHNE = 1? End No No Yes Yes Transfer counter = 0 or DISEL = 1? Clear DTCER Interrupt exception handling Figure 7.2 Flowchart of DTC Operation |
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