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Os motores de busca de Datasheet de Componentes eletrônicos |
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Os motores de busca de Datasheet de Componentes eletrônicos |
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SST26VF040A-80I/MFVAO Folha de dados(PDF) 35 Page - Microchip Technology |
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SST26VF040A-80I/MFVAO Folha de dados(HTML) 35 Page - Microchip Technology |
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35 / 73 page  2020-2021 Microchip Technology Inc. DS20006292B-page 35 SST26VF040A 5.31 Write Enable (WREN) The Write Enable (WREN) instruction sets the Write Enable Latch bit in the STATUS register to ‘1’, allowing write operations to occur. The WREN instruction must be executed prior to any of the following operations: Sector Erase, 32-Kbyte Block Erase or 64-Kbyte Block Erase, Chip Erase, Page Program, Program Security ID, Lockout Security ID, Lock-Down Protection Settings, SPI Quad Page program, and Write STATUS register. To execute a Write Enable the host drives CE# low then sends the Write Enable command cycle (06H) then drives CE# high. See Figures 5-34 and 5-35 for the WREN instruction sequence. FIGURE 5-34: WRITE ENABLE SEQUENCE (SQI) FIGURE 5-35: WRITE ENABLE SEQUENCE (SPI) MODE 3 0 1 SCK SIO[3:0] CE# 06 MODE 0 CE# SO SI SCK 0 1 234 5 6 7 06 High-Impedance MODE 0 MODE 3 MSB |
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