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CS495313 数据表(PDF) 28 Page - Cirrus Logic |
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CS495313 数据表(HTML) 28 Page - Cirrus Logic |
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28 / 38 page ![]() CS4953xx Data Sheet 32-bit Audio Decoder DSP Family 28 ®Copyright 2008 Cirrus Logic, Inc. DS705PP2 5.21 Switching Characteristics — SDRAM Interface Refer to Figure 17 through Figure 20. (SD_CLKOUT = SD_CLKIN) Parameter Symbol Min Typical Max Unit SD_CLKIN high time tsdclkh 2.3 - ns SD_CLKIN low time tsdclkl 2.3 - ns SD_CLKOUT rise/fall time tsdclkrf -1 ns SD_CLKOUT Frequency 150 MHz SD_CLKOUT duty cycle - 45 55 % SD_CLKOUT rising edge to signal valid tsdcmdv -3.8 ns Signal hold from SD_CLKOUT rising edge tsdcmdh 1.1 - ns SD_CLKOUT rising edge to SD_DQMn valid tsddqv -3.8 - ns SD_DQMn hold from SD_CLKOUT rising edge tsddqh 1.38 - ns SD_DATA valid setup to SD_CLKIN rising edge tsddsu 1.3 - ns SD_DATA valid hold to SD_CLKIN rising edge tsddh 1.38 - ns SD_CLKOUT rising edge to ADDRn valid tsdav -3.8 - ns |
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