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BR25L020FVM-WE2 Datasheet(PDF) 7 Page - Rohm |
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BR25L020FVM-WE2 Datasheet(HTML) 7 Page - Rohm |
7 / 17 page 7/16 BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W Technical Note 1. Write enable (WREN) / disable (WRDI) cycle Command mode 0000 0000 0000 0000 Ope code Command WREN WRDI READ WRITE Contents Write enable command Write disable command Read command Write command BR25L080-W BR25L160-W BR25L320-W BR25L640-W BR25L010-W BR25L020-W BR25L040-W Write enable Write disable Read Write RDSR Status register read command Read status register 0000 * 110 * 100 * 011 * 010 * 001 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0110 0100 0011 0010 0001 WRSR Status register write command Write status register 0000 * 101 0000 0000 0101 Timing chart CS SO High-Z SI 0 00 0 * 1 1 10 SCK 1 02 3 4 5 6 7 Fig. 35 Write enable command 1.WREN (WRITE ENABLE) : Write enable High-Z CS SO SI 0 00 0 * 0 1 10 SCK 1 02 3 4 5 6 7 Fig. 36 Write disable 1.WRDI (WRITE DISABLE) : Write disable *1 BR25L010/020/040-W=Don't care BR25L080/160/320/640-W=“0” input *1 BR25L010/020/040-W=Don't care BR25L080/160/320/640-W=“0” input * 110 * 100 A8011 A8010 * 001 * 101 This IC has write enable status and write disable status. It is set to write enable status by write enable command, and it is set to write disable status by write disable command. As for these commands, set CS LOW, and then input the respective ope codes. The respective commands accept command at the 7-th clock rise. Even with input over 7 clocks, command becomes valid. When to carry out write and write status register command, it is necessary to set write enable status by the write enable command. If write or write status register command is input in the write disable status, commands are cancelled. And even in the write enable status, once write and write status register command is executed once, it gets in the write disable status. After power on, this IC is in write disable status. 2010.07 - Rev. B www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. |
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