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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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DSP56366P 데이터시트(PDF) 43 Page - NXP Semiconductors |
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DSP56366P 데이터시트(HTML) 43 Page - NXP Semiconductors |
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43 / 110 page  DSP56366 Technical Data, Rev. 3.1 Freescale Semiconductor 3-17 Table 3-9 DRAM Page Mode Timings, One Wait State (Low-Power Applications)1, 2, 3 No. Characteristics Symbol Expression 20 MHz4 30 MHz4 Unit Min Max Min Max 131 Page mode cycle time for two consecutive accesses of the same direction Page mode cycle time for mixed (read and write) accesses tPC 2 × T C 1.25 × T C 100.0 62.5 — — 66.7 41.7 — — ns 132 CAS assertion to data valid (read) tCAC TC − 7.5 — 42.5 — 25.8 ns 133 Column address valid to data valid (read) tAA 1.5 × T C − 7.5 — 67.5 — 42.5 ns 134 CAS deassertion to data not valid (read hold time) tOFF 0.0 — 0.0 — ns 135 Last CAS assertion to RAS deassertion tRSH 0.75 × T C − 4.0 33.5 — 21.0 — ns 136 Previous CAS deassertion to RAS deassertion tRHCP 2 × T C − 4.0 96.0 — 62.7 — ns 137 CAS assertion pulse width tCAS 0.75 × T C − 4.0 33.5 — 21.0 — ns 138 Last CAS deassertion to RAS deassertion5 • BRW[1:0] = 00 • BRW[1:0] = 01 • BRW[1:0] = 10 • BRW[1:0] = 11 tCRP 1.75 × T C − 6.0 3.25 × T C − 6.0 4.25 × T C − 6.0 6.25 × T C – 6.0 81.5 156.5 206.5 306.5 — — — — 52.3 102.2 135.5 202.1 — — — — ns 139 CAS deassertion pulse width tCP 0.5 × T C − 4.0 21.0 — 12.7 — ns 140 Column address valid to CAS assertion tASC 0.5 × T C − 4.0 21.0 — 12.7 — ns 141 CAS assertion to column address not valid tCAH 0.75 × T C − 4.0 33.5 — 21.0 — ns 142 Last column address valid to RAS deassertion tRAL 2 × T C − 4.0 96.0 — 62.7 — ns 143 WR deassertion to CAS assertion tRCS 0.75 × T C − 3.8 33.7 — 21.2 — ns 144 CAS deassertion to WR assertion tRCH 0.25 × T C − 3.7 8.8 — 4.6 — ns 145 CAS assertion to WR deassertion tWCH 0.5 × T C − 4.2 20.8 — 12.5 — ns 146 WR assertion pulse widt h tWP 1.5 × T C − 4.5 70.5 — 45.5 — ns 147 Last WR assertion to RAS deassertion tRWL 1.75 × T C − 4.3 83.2 — 54.0 — ns 148 WR assertion to CAS deassertion tCWL 1.75 × T C − 4.3 83.2 — 54.0 — ns 149 Data valid to CAS assertion (Write) tDS 0.25 × T C − 4.0 8.5 — 4.3 — ns |
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