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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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AT697F Datasheet(PDF) 142 Page - ATMEL Corporation |
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AT697F Datasheet(HTML) 142 Page - ATMEL Corporation |
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142 / 155 page  142 7703C–AERO–6/09 AT697F ADVANCE INFORMATION Figure 65. Burst of RAM Fetches and RAM Write Sequence - n Waitstates Fetch Inst 0 Load Data Fetch Inst 1 Write Data Inst Addr 0 Data Addr 1 Inst Addr 1 Data Addr 2 Inst 0 Data Inst 1 WData CB Inst 0 CB CB Inst 1 WCB t14 t11 t13 t12 t13 t12 t13 t12 t14 t11 t13 t12 t13 t12 t13 t12 t17 t17 t17 t17 t17 t17 t17 t17 t10 t10 t10 t10 n W S n W S n WS n WS n WS n WS n WS t3 n WS t3 SDCLK A[27:0] RAMS0* RAMOE0* RWE[3:0]* D[31:0] CB[7:0] (PRELIMINARY) Figure 66. SDRAM Read (or Fetch) with Precharge - Burst length = 1; CL = 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 ba ba ba ba row co row d1 t12 t12 t22 t22 t22 t22 t22 t21 t21 t22 t22 t22 t22 t22 t22 t22 t22 t22 t22 t22 t22 t22 t22 t10 t10 t10 t10 t10 t10 t10 trp trp Tras tcas tcas Trcd Tras Trcd Activate Read precharge activate SDCLK Memory - A[16:15] A[14:2] SDCS* SDRAS* SDCAS* SDWE* SDDQM[3:0]* D[31:0] (PRELIMINARY) |
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