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IS25LEG-RGLA2:P-TY 데이터시트(PDF) 149 Page - Integrated Silicon Solution, Inc |
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IS25LEG-RGLA2:P-TY 데이터시트(HTML) 149 Page - Integrated Silicon Solution, Inc |
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149 / 193 page ![]() IS25LE01GG IS25WE01GG Integrated Silicon Solution, Inc.- www.issi.com 149 Rev. A3 10/02/2025 8.50 EXIT 4-BYTE ADDRESS MODE OPERATION (EX4B, 29h) In order to be backward compatible, the Exit 4-byte Address Mode instruction allows 24bit address (A23-A0) to be used to access the memory array up to 128Mb. The Bank Address Register must be used to access the memory array beyond 128Mb. To execute EX4B operation, the host drives CE# low, sends the instruction code and then drives CE# high. A Write Enable (WREN, 06h) command is not required prior to EX4B (29h) command. Note: The EX4B instruction will reset the Bit 7 (EXTADD) of the volatile Bank Address Register to “0” ”, but will not change the non-volatile Bank Address Register. Figure 8.109 Exit 4-byte Address Mode Sequence In SPI Mode Instruction = 29h CE# SCK SI 0 1 2 3 4 5 6 7 Mode 3 Mode 0 SO High Impedance Figure 8.110 Exit 4-byte Address Mode Sequence In QPI Mode 29h CE# SCK IO[3:0] 0 1 Mode 3 Mode 0 |
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