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IS43LD16640C bảng dữ liệu(PDF) 48 Page - Integrated Silicon Solution, Inc |
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IS43LD16640C bảng dữ liệu(HTML) 48 Page - Integrated Silicon Solution, Inc |
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48 / 142 page ![]() IS43/46LD16640C IS43/46LD32320C Integrated Silicon Solution, Inc. — www.issi.com 48 Rev. C 07/02/2021 ® Long-term Support World Class Quality READ Burst operation Followed by PRECHARGE For the earliest possible precharge, the PRECHARGE command can be issued BL/2 clock cycles after a READ command. A new bank ACTIVATE command can be issued to the same bank after the row precharge time (tRP) has elapsed. A PRECHARGE command cannot be issued until after tRAS is satisfied. The minimum READ-to-PRECHARGE time (tRTP) must also satisfy a minimum analog time from the rising clock edge that initiates the last 4-bit prefetch of a READ command. tRTP begins BL/2 - 2 clock cycles after the READ command. If the burst is truncated by a BST command, the effective BL value is used to calculate when tRTP begins. READ Burst Followed by PRECHARGE – RL = 3, BL = 8, RU(tRTP(MIN)/tCK) = 2 Burst Read followed by Precharge: RL=3, BL=8, RU(tRTP(min)/tCK)=2 |
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