uPD78F0592

User’s Manual 78K0/Kx2-A 8-Bit Single-Chip Microcontrollers μPD78F0590 μPD78F0591 μPD78F0592 μPD78F0593 Document No. U19780EJ2V0UD00 (2nd edition) Date Published February 2010 NS Printed in Japan 2010 [MEMO] 2 User’s Manual U19780EJ2V0UD NOTES FOR CMOS DEVICES (1) VOLTAGE APPLICATION WAVEFORM AT INPUT PIN: Waveform distortion due to input noise or a reflected wave may cause malfunction. If the input of the CMOS device stays in the area between VIL (MAX) and VIH (MIN) due to noise, etc., the device may malfunction. Take care to prevent chattering noise from entering the device when the input level is fixed, and also in the transition period when the input level passes through the area between VIL (MAX) and VIH (MIN). (2) HANDLING OF UNUSED INPUT PINS: Unconnected CMOS device inputs can be cause of malfunction. If an input pin is unconnected, it is possible that an internal input level may be generated due to noise, etc., causing malfunction. CMOS devices behave differently ...