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MB91F587LD データシート(PDF) 166 Page - SPANSION |
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MB91F587LD データシート(HTML) 166 Page - SPANSION |
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166 / 177 page  D at aS h ee t August 22, 2014, MB91F587LA_DS705-00012-2v0-E 163 CONFIDENTIAL (2) Notes While the Flash memory is written or erased, shutdown of the external power supply (Vcc) is prohibited. In the application system where Vcc might disappear while writing, be sure to turn the power off by using an external low-voltage detector. To put it concretely, after the external power supply voltage falls below the detection voltage (VDL*), hold Vcc at 2.7V or more within the duration calculated by the following expression: Td*[µs] + (period of PCLK [µs] × 257) + 50[µs] *: See "4. AC characteristics (8) Low-voltage detection (External low-voltage detection)." |
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