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HD6432351 датащи(PDF) 336 Page - Renesas Technology Corp |
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HD6432351 датащи(HTML) 336 Page - Renesas Technology Corp |
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336 / 1025 page ![]() Section 8 Data Transfer Controller (DTC) Rev. 3.00 Sep 15, 2006 page 302 of 988 REJ09B0330-0300 8.3 Operation 8.3.1 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 8.2 shows a flowchart of DTC operation. Start Read DTC vector Next transfer Read register information Data transfer Write register information Clear an activation flag CHNE = 1 End No No Yes Yes Transfer Counter = 0 or DISEL = 1 Clear DTCER Interrupt exception handling Figure 8.2 Flowchart of DTC Operation |
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