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MPC8378CVRAFDA 数据表(PDF) 19 Page - Freescale Semiconductor, Inc |
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MPC8378CVRAFDA 数据表(HTML) 19 Page - Freescale Semiconductor, Inc |
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19 / 126 page  MPC8378E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2 Freescale Semiconductor 19 DDR1 and DDR2 SDRAM 6.2.2 DDR1 and DDR2 SDRAM Output AC Timing Specifications Table 20 shows the DDR1 and DDR2 SDRAM output AC timing specifications. Table 20. DDR1 and DDR2 SDRAM Output AC Timing Specifications Parameter Symbol1 Min Max Unit Notes MCK n cycle time, MCKn/MCKn crossing tMCK 510 ns 2 ADDR/CMD output setup with respect to MCK 400 MHz data rate 333 MHz data rate 266 MHz data rate 200 MHz data rate tDDKHAS 1.95 2.40 3.15 4.20 — — — — ns 3, 7 ADDR/CMD output hold with respect to MCK 400 MHz data rate 333 MHz data rate 266 MHz data rate 200 MHz data rate tDDKHAX 1.95 2.40 3.15 4.20 — — — — ns 3, 7 MCS n output setup with respect to MCK 400 MHz data rate 333 MHz data rate 266 MHz data rate 200 MHz data rate tDDKHCS 1.95 2.40 3.15 4.20 — — — — ns 3 MCS n output hold with respect to MCK 400 MHz data rate 333 MHz data rate 266 MHz data rate 200 MHz data rate tDDKHCX 1.95 2.40 3.15 4.20 — — — — ns 3 MCK to MDQS skew tDDKHMH –0.6 0.6 ns 4, 8 MDQ//MDM output setup with respect to MDQS 400 MHz data rate 333 MHz data rate 266 MHz data rate 200 MHz data rate tDDKHDS, tDDKLDS 550 800 1100 1200 — — — — ps 5, 8 MDQ//MDM output hold with respect to MDQS 400 MHz data rate 333 MHz data rate 266 MHz data rate 200 MHz data rate tDDKHDX, tDDKLDX 700 800 1100 1200 — — — — ps 5, 8 MDQS preamble start tDDKHMP –0.5 × tMCK –0.6 –0.5 × tMCK + 0.6 ns 6, 8 |
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