Схемы, платы, компоненты

36мс, если напряжение питания было меньше 0,5В 6.4.1.2 Power On or Power Cycle Followings are requirements for Power on and Power cycle to assure a reliable SD Card hard reset. (1) Voltage level shall be below 0.5V (2) Duration shall be at least 1ms. 6.4.1.3 Power Supply Ramp Up The power ramp up time is defined from 0.5V threshold level up to the operating supply voltage which is stable between VDD(min.) and VDD(max.) and host can supply SDCLK. (1) Voltage of power ramp up should be monotonic as much as possible. (2) The minimum ramp up time should be 0.1ms. (3) The maximum ramp up time should be 35ms for 2.7-3.6V power supply.