An electronic circuitry for a photographic camera including functioning circuits for carrying out various functions of the camera, an electronic flash circuit having at least a voltage boosting circuit and a capacitor which charges the output of the voltage boosting circuit for flash, a control circuit for outputting control signals to the functioning circuits and to the electronic flash circuit and a battery for supplying power to the functioning circuits, the electronic flash circuit and the control circuit. In order to prevent erroneous functions of the functioning circuits caused by noise, the control circuit inhibits the output of the control signals to the functioning circuits while the capacitor for the flashing included in the electronic flash circuit is being charged.