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PIC17C752-08/CL 데이터시트(PDF) 262 Page - Microchip Technology |
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PIC17C752-08/CL 데이터시트(HTML) 262 Page - Microchip Technology |
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262 / 328 page ![]() PIC17C7XX DS30289A-page 262 Preliminary © 1998 Microchip Technology Inc. FIGURE 20-20: MEMORY INTERFACE WRITE TIMING TABLE 20-21: MEMORY INTERFACE WRITE REQUIREMENTS Param. No. Sym Characteristic Min Typ† Max Units Conditions 150 TadV2alL AD<15:0> (address) valid to PIC17CXXX 0.25TCY - 10 — — ns ALE ↓ (address setup time) PIC17LCXXX 0.25TCY - 10* — — 151 TalL2adI ALE ↓ to address out invalid PIC17CXXX 0 — — ns (address hold time) PIC17LCXXX 0* — — 152 TadV2wrL Data out valid to WR ↓ PIC17CXXX 0.25TCY - 40 — — ns (data setup time) PIC17LCXXX 0.25TCY - 40* — — 153 TwrH2adI WR ↑ to data out invalid PIC17CXXX — 0.25TCY§— ns (data hold time) PIC17LCXXX — 0.25TCY§— 154 TwrL WR pulse width PIC17CXXX — 0.25TCY§— ns PIC17LCXXX — 0.25TCY§— * These parameters are characterized but not tested. † Data in “Typ” column is at 5V, 25 °C unless otherwise stated. These parameters are for design guidance only and are not tested. § This specification ensured by design. OSC1 ALE OE WR AD<15:0> Q1 Q2 Q3 Q4 Q1 Q2 150 151 152 153 154 addr out data out addr out |
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