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STV-DCA/CIF-E01 数据表(PDF) 19 Page - STMicroelectronics |
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STV-DCA/CIF-E01 数据表(HTML) 19 Page - STMicroelectronics |
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19 / 60 page  STV0680A + VV6444/6410/6500 Digital Camera Chipset; Customer Datasheet, Rev 3.0, March 2000 PRELIMINARY CDSTV0680F-C Commercial in confidence 19 STV0680F_contents.fm Figure 2 : SDRAM Read Timing (16Mbit device, burst read) Figure 3 : SDRAM Write Timing (16Mbit device, burst write) Table 7 : Timing parameters for SDRAM read/write 4.3.3 SDRAM refresh Period The SDRAM refresh period from STV0680A is guaranteed to be no greater than 15.6 µS during ‘Snapshot’/self-timer/continuous/ tethered video modes of operation (i.e. not standby mode). In standby mode, the SDRAM is set to self-refresh, therefore no Symbol Min Max Units Symbol Min Max Units tCK 166.45 166.89 ns tDS 81.01 ns tCH ½tCK tDH 83.41 ns tCL ½tCK tRCD 1tCK tAC ½tCK tRAS 55 tCK tOH 0ns tRC 7tCK tCMS 82.88 ns tRP 2tCK tCMH 82.85 ns tRCD 1tCK tAS 82.88 ns tAH 82.76 ns DCLK Command DQM A0-9,BA A10 ACTIVE WRITE NOP PRECHARGE NOP ROW COLUMN ROW DIN M DIN M + 1 DIN M + 2 DIN M + 3 DQ tCK tRCD tRC CK E tRAS tRP tCMS tCMH tAS tAH tL tH tCMS tCMH tDS tDH |
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