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LPC844 Datasheet(PDF) 46 Page - NXP Semiconductors |
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LPC844 Datasheet(HTML) 46 Page - NXP Semiconductors |
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46 / 97 page  LPC84x All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2018. All rights reserved. Product data sheet Rev. 1.7 — 27 February 2018 46 of 97 NXP Semiconductors LPC84x 32-bit Arm Cortex-M0+ microcontroller 11.2 Power-up ramp conditions [1] Assert the external reset pin until VDD is > 1.8 V if the power-up characteristic specification cannot be implemented. [2] VDD to stay above V1 for the entire duration twd. [3] VDD to stay below V2 for the minimum duration of twd. Table 12. Power-up characteristics[1] Tamb = 40 C to +105 C. Symbol Parameter Min Typ Max Unit twd Window duration (time where V1<VDD<V2) -- 8 ms V1 Window low voltage [2] 1.4 - - V V2 Window high voltage [3] -- 1.8 V t1: The time when there is no restriction on the ramp rate. Fig 15. Power-up ramp VDD V2 0 twd t1 V1 aaa-025788 |
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