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M58PR256J Datasheet(PDF) 81 Page - STMicroelectronics |
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M58PR256J Datasheet(HTML) 81 Page - STMicroelectronics |
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81 / 114 page  M58PR256J, M58PR512J DC and ac parameters 81/114 Table 31. Write ac characteristics, Chip Enable controlled(1) 1. Sampled only, not 100% tested. Symbol Alt Parameter 108MHz 66MHz Unit tAVAV tWC Address Valid to Next Address Valid Min 96 96 ns tAVEH tWC Address Valid to Chip Enable High Min 40 45 ns tAVLH Address Valid to Latch Enable High Min 5 5 ns tDVEH tDS Data Valid to Chip Enable High Min 40 40 ns tEHAX tAH Chip Enable High to Address Transition Min 0 0 ns tEHDX tDH Chip Enable High to Input Transition Min 0 0 ns tEHEL tCPH Chip Enable High to Chip Enable Low Min 20 20 ns tEHGL Chip Enable High to Output Enable Low Min 0 0 ns tEHWH tCH Chip Enable High to Write Enable High Min 0 0 ns tELKH Chip Enable Low to Clock High Min 5 5 ns tELEH tCP Chip Enable Low to Chip Enable High Min 40 45 ns tELLH Chip Enable Low to Latch Enable High Min 9 10 ns tELQV Chip Enable Low to Output Valid Min 96 96 ns tGHEL Output Enable High to Chip Enable Low Min 14 17 ns tLHAX Latch Enable High to Address Transition Min 5 5 ns tLLLH Latch Enable Pulse Width Min 7 7 ns tWHEL (2) 2. tWHEL has this value when reading in the targeted bank or when reading after a Set Configuration Register command. System designers should take this into account and may insert a software No-Op instruction to delay the first read in the same bank after issuing any command and to delay the first read to any address after issuing a Set Configuration Register command. If the first read after the command is a Read Array operation in a different bank and no changes to the Configuration Register have been issued, tWHEL is 0ns. Write Enable High to Chip Enable Low Min 20 20 ns tWHQV Write Enable High to Output Valid Min 116 116 ns tWLEL tCS Write Enable Low to Chip Enable Low Min 0 0 ns tEHVPL Chip Enable High to VPP Low Min 200 200 ns tEHWPL Chip Enable High to Write Protect Low Min 200 200 ns tQVVPL Output (Status Register) Valid to VPP Low Min 0 0 ns tQVWPL Output (Status Register) Valid to Write Protect Low Min 0 0 ns tVPHEH tVPS VPP High to Chip Enable High Min 200 200 ns tWPHEH Write Protect High to Chip Enable High Min 200 200 ns |
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