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DSP56367 Datasheet(PDF) 49 Page - Freescale Semiconductor, Inc |
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DSP56367 Datasheet(HTML) 49 Page - Freescale Semiconductor, Inc |
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49 / 100 page  External Memory Expansion Port (Port A) DSP56367 Technical Data, Rev. 2.1 Freescale Semiconductor 3-25 Table 3-13 DRAM Out-of-Page and Refresh Timings, Fifteen Wait States1, 2 No. Characteristics Symbol Expression3 100 MHz Unit Min Max 157 Random read or write cycle time tRC 16 × TC 160.0 — ns 158 RAS assertion to data valid (read) tRAC 8.25 × TC − 5.7 — 76.8 ns 159 CAS assertion to data valid (read) tCAC 4.75 × TC − 5.7 — 41.8 ns 160 Column address valid to data valid (read) tAA 5.5 × TC − 5.7 — 49.3 ns 161 CAS deassertion to data not valid (read hold time) tOFF 0.0 0.0 — ns 162 RAS deassertion to RAS assertion tRP 6.25 × TC − 4.0 58.5 — ns 163 RAS assertion pulse width tRAS 9.75 × TC − 4.0 93.5 — ns 164 CAS assertion to RAS deassertion tRSH 6.25 × TC − 4.0 58.5 — ns 165 RAS assertion to CAS deassertion tCSH 8.25 × TC − 4.0 78.5 — ns 166 CAS assertion pulse width tCAS 4.75 × TC − 4.0 43.5 — ns 167 RAS assertion to CAS assertion tRCD 3.5 × TC ± 2 33.0 37.0 ns 168 RAS assertion to column address valid tRAD 2.75 × TC ± 2 25.5 29.5 ns 169 CAS deassertion to RAS assertion tCRP 7.75 × TC − 4.0 73.5 — ns 170 CAS deassertion pulse width tCP 6.25 × TC – 6.0 56.5 — ns 171 Row address valid to RAS assertion tASR 6.25 × TC − 4.0 58.5 — ns 172 RAS assertion to row address not valid tRAH 2.75 × TC − 4.0 23.5 — ns 173 Column address valid to CAS assertion tASC 0.75 × TC − 4.0 3.5 — ns 174 CAS assertion to column address not valid tCAH 6.25 × TC − 4.0 58.5 — ns 175 RAS assertion to column address not valid tAR 9.75 × TC − 4.0 93.5 — ns 176 Column address valid to RAS deassertion tRAL 7 × TC − 4.0 66.0 — ns 177 WR deassertion to CAS assertion tRCS 5 × TC − 3.8 46.2 — ns 178 CAS deassertion to WR4 assertion tRCH 1.75 × TC – 3.7 13.8 — ns 179 RAS deassertion to WR4 assertion tRRH 0.25 × TC − 2.0 0.5 — ns 180 CAS assertion to WR deassertion tWCH 6 × TC − 4.2 55.8 — ns 181 RAS assertion to WR deassertion tWCR 9.5 × TC − 4.2 90.8 — ns 182 WR assertion pulse width tWP 15.5 × TC − 4.5 150.5 — ns |
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