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EMC646SP16JS-12L Datasheet(PDF) 3 Page - Emerging Memory & Logic Solutions Inc |
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EMC646SP16JS-12L Datasheet(HTML) 3 Page - Emerging Memory & Logic Solutions Inc |
3 / 65 page EMC646SP16J 4Mx16 CellularRAM 3 Preliminary Table of Contents Features ...................................................................................................................................................................................... 2 Options ................................................................................................................................................................................... 2 General Description .................................................................................................................................................................... 6 Functional Description ................................................................................................................................................................ 9 Power-Up Initialization ............................................................................................................................................................ 9 Bus Operating Modes ................................................................................................................................................................. 10 Asynchronous Mode ............................................................................................................................................................... 10 Page Mode READ Operation ................................................................................................................................................ 11 Burst Mode Operation ............................................................................................................................................................ 12 Mixed-Mode Operation ........................................................................................................................................................... 15 WAIT Operation ...................................................................................................................................................................... 15 LB# / UB# Operation............................................................................................................................................................... 15 Low-Power Operation......... ........................................................................................................................................................ 16 Standby Mode Operation ........................................................................................................................................................ 16 Temperature Compensated Refresh....................................................................................................................................... 16 Partial Array Refresh .............................................................................................................................................................. 16 Deep Power-Down Operation................................................................................................................................................. 16 Registers..................................................................................................................................................................................... 17 Access Using CRE ................................................................................................................................................................. 17 Software Access ..................................................................................................................................................................... 21 Bus Configuration Register...................................................................................................................................................... 22 Burst Length (BCR[2:0]) Default = Continuous Burst ......................................................................................................... 23 Burst Wrap (BCR[3]) Default = No Wrap ............................................................................................................................ 23 Drive Strength (BCR[5:4]) Default = Outputs Use Half-Drive Strength ............................................................................... 24 WAIT Configuration (BCR[8]) Default = WAIT Transitions One Clock Before Data Valid / Invalid....................................... 24 WAIT Polarity (BCR[10]) Default = WAIT Active HIGH....................................................................................................... 24 Latency Counter (BCR[13:11]) Default = Three Clock Latency .......................................................................................... 25 Initial Access Latency (BCR[14]) Default = Variable........................................................................................................... 25 Operating Mode (BCR[15]) Default = Asynchronous Operation......................................................................................... 26 Refresh Configuration Register............................................................................................................................................... 27 Partial Array Refresh (RCR[2:0]) Default = Full Array Refresh ......................................................................................... 28 Deep Power-Down (RCR[4]) Default = DPD Disabled ....................................................................................................... 28 Page Mode Operation (RCR[7]) Default = Disabled .......................................................................................................... 28 Device Identification Register.................................................................................................................................................. 28 Electrical Characteristics............................................................................................................................................................. 29 Timing Requirements................................................................................................................................................................... 31 Timing Diagrams.......................................................................................................................................................................... 35 |
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