Цитата(Mechanical men @ Feb 28 2007, 14:57)

Если медленнее - рекомендуется использовать супервизоры питания или ресета...
В Data Sheets для C8051F310 и C8051F320 (сейчас нами используются обе) по поводу Power-On Reset и времени нарастания питающего напряжения VDD написано несколько по разному (хотя эти чипы в части питания вроде близки ???). Создается впечатление, что для F320 вовсе нет проблемы с
maximum VDD ramp time is 1 ms . Так ли это и для F320?
Ниже выдержки из описаний:
9.1. Power-On Reset (F310)
During power-up, the device is held in a reset state and the /RST pin is driven low until VDD settles above VRST.
A delay occurs before the device is released from reset; the delay decreases as the VDD ramp time increases (VDD ramp time is defined as how fast VDD ramps from 0 V to VRST). Figure 9.2. plots the power-on and VDD monitor reset timing.
The maximum VDD ramp time is 1 ms; slower ramp times may cause the device to be released from reset before VDD reaches the VRST level. For ramp times less than 1 ms, the power-on reset delay (TPORDelay) is typically less than 0.3 ms.
10.1. Power-On Reset (F320)
During power-up, the device is held in a reset state and the /RST pin is driven low until VDD settles above VRST. A Power-On Reset delay (TPORDelay) occurs before the device is released from reset; this delay is typically less than 0.3 ms. Figure 10.2. plots the power-on and VDD monitor reset timing.