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HY29F040A Datasheet(PDF) 4 Page - Hynix Semiconductor |
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HY29F040A Datasheet(HTML) 4 Page - Hynix Semiconductor |
4 / 40 page 4 HY29F040A BUS OPERATION Table 1. Bus Operations(1) OPERATION /CE /OE /WE A0 A1 A6 A9 I/O Electronic ID Manufacturer Code(2) LL H L L L V ID Code Electronic ID Device Code(2) LL H H L L V ID Code Read(3) L L H A0A1 A6A9 D OUT Standby H X X X X X X High Z Output Disable L H H X X X X High Z Write L H L A0 A1 A6 A9 D IN (4) Enable Sector Protect L V ID LX X X V ID X Verify Sector Protect L L H L H L V ID Code Notes: 1. L = V IL, H = VIH, X = Don’t Care. See DC Characteristics for voltage levels. 2. Manufacturer and device codes may also be accessed via a command register sequence. Refer to Table 4. 3. /WE can be V IL if /CE is VIL, /OE at VIH initiates the write operations. 4. Refer to Table 4 for valid D IN during a write operation. Table 2. Sector Protection Verify Electronic ID Codes Type A18 A17 A16 A6 A1 A0 Code DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 HEX Manufacture Code X X X V IL V IL V IL ADH 10 10 1 1 0 1 HY29F040A Device Code X X X V IL V IL V IH A4H 10 10 0 1 0 0 Sector Protection Sector Addresses V IL V IH V IL 01H(1) 00 00 0 0 0 1 Notes: 1. Outputs 01H at protected sector addresses, and output 00H at unprotected sector addresses. |
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