Отправлено artem 06 января 2005 г. 04:10 В ответ на: LPC в каком порядке ему питалова подавать? Сначала 3.3 а потом 1.8 или наоборот? отправлено artem 06 января 2005 г. 03:54

Speaking in general, there are no sequence requirements for powering up the supplies (V18, V3, V18A and V3A). However, for
proper reset handling It is absolutely necessary to have valid voltage supply on V18 pins, since on-chip Reset circuit and oscillator
dedicated hardware are powered by them. V3 pins enable microcontroller’s interface to the environment via its digital pins.
Consequently, not providing V3 power supply will not affect the reset sequence itself, but will prevent microcontroller from
communicating with external world.