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UPD46128512-E12X Datasheet(PDF) 5 Page - NEC |
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UPD46128512-E12X Datasheet(HTML) 5 Page - NEC |
5 / 82 page Preliminary Data Sheet M17507EJ2V0DS 5 μ PD46128512-X Truth Table Asynchronous Operation Mode /CE1 CE2 /ADV /OE /WE /LB /UB DQ /WAIT DQ0 to DQ7 DQ8 to DQ15 Not selected (Standby Mode 1) H H × × × × × High-Z High-Z High-Z Not selected (Standby Mode 2) Note1 × L × × × × × High-Z High-Z High-Z Word read L H Note3 L H L L DOUT DOUT High-Z Lower byte read L H DOUT High-Z High-Z Upper byte read H L High-Z DOUT High-Z Output disable H H High-Z High-Z High-Z Output disable H × × High-Z High-Z High-Z Word write L L L DIN DIN High-Z Lower byte write L H DIN High-Z High-Z Upper byte write H L High-Z DIN High-Z Abort write Note2 H H High-Z High-Z High-Z Notes 1. CE2 pin must be fixed HIGH except Standby Mode 2 (refer to 2.3 Standby Mode Status Transition). 2. If /WE = LOW and /LB = /UB = HIGH, memory does not accept write data, so write operation is not available. 3. Fixed LOW or toggle HIGH → LOW → HIGH Remark H, HIGH : VIH, L, LOW : VIL, ×: VIH or VIL Clock pin must be fixed either LOW or HIGH. |
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Similar Description - UPD46128512-E12X |
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