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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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SH7041A bảng dữ liệu(PDF) 738 Page - Renesas Technology Corp |
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SH7041A bảng dữ liệu(HTML) 738 Page - Renesas Technology Corp |
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738 / 923 page  700 n=1 n=N? n+1 →n Yes No Note: If a memory cell does not operate normally and cannot be erased, one H'FF byte is transmitted as an erase error, and the erase operation and subsequent operations are halted. Start Set pin to the boot program mode then reset start The host continuously sends data (H'00) using a fixed bit rate This LSI measures the low period of data H'00 sent by the host This LSI calculates the bit rate and sets value to the bit rate register After adjustment of the bit rate, this LSI sends 1 byte of data H'00 to the host as a sign of completion of adjustment The host checks whether the sign (H'00) indicating completion of bit rate adjustment is received, then transmits 1 byte of data H'55 After receiving H'55, this LSI sends 1 byte of H'AA The host sends the byte number (N) of the user program in sequence of upper byte then lower byte This LSI sends the received byte number to the host as verify data (echo back) The host transmits the user program in sequence using byte units This LSI sends the received program to the host as verify data (echo back) The received user program is transferred to the on-chip RAM Transmission complete Data of the flash memory is checked. All data are erased if data already exists After confirming that all data of the flash memory have been erased, this LSI sends 1 byte of H'AA to the host The write control program transferred to the on-chip RAM is executed Figure 22.9 Boot Mode Execution Procedure |
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