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發表於 2015-5-5 08:35:53
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LPC31XX也是一顆ARM base 的MCU,它的RESET腳是RSTIN_N, 這隻腳要回到高電位,MCU才會離開RESET狀態.
http://www.nxp.com/documents/data_sheet/LPC3141_43.pdf
STM32FXXX這顆MCU,它內部有上電RESET電路和掉電RESET電路,如果VDD低於2V左右,
MCU就會一直處於RESET狀態.
The device has an integrated power on reset (POR)/power down reset (PDR) circuitry. It is
always active, and ensures proper operation starting from/down to 2 V. The device remains
in reset mode when VDD is below a specified threshold, VPOR/PDR, without the need for an
external reset circuit. |
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