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ATSAM9708 数据表(PDF) 15 Page - ATMEL Corporation |
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ATSAM9708 数据表(HTML) 15 Page - ATMEL Corporation |
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15 / 31 page ![]() 15 1772E–DRMSD–10-Apr-06 ATSAM9708 Figure 12-3. SDRAM Basic Timing, DRAM = High Note: 1. See Table 12-1 on page 16. Figure 12-4. SDRAM Init Sequence, DRAM = High Note: 1. See Table 12-1 on page 16. 012345 012345 0 12345 0 SDRAM READ SDRAM WRITE SDRAM AUTO REFRESH CAS RAS WWE row col DRAxx WDxx CK_OUT (1) 6 012345 012345 0 12345 0 1 DRAxx PRECHARGE A10 = 1 AUTO REFRESH (TWO CYCLES) LOAD MODE REG DRA = 020H CAS RAS REFRESH WWE row col CK_OUT (1) |
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