CHAPTER 3 PIN FUNCTIONSUser’s Manual U14826EJ5V0UD383.3 Pin I/O Circuits and Recommended Connection of Unused PinsThe I/O circuit type of each pin and recommended connection of unused pins are shown in Table 3-1.For the I/O circuit configuration of each type, see Figure 3-1.Table 3-1. Types of Pin I/O Circuits and Recommended Connection of Unused PinsPin Name I/O Circuit Type I/O Recommended Connection of Unused PinsP00 to P07 5P20/TMO/BSFOP21/TMI8Input: Independently connect to V DD or V SS via a resistor.Output: Leave open.P40/KR10 to P43/KR13(mask ROM version)2-EP40/KR10 to P43/KR13(μPD78E9860A, 78E9861A)Connect directly to V DD .RESET2I/O−IC Connect directly to V SS.V PP− −Independently connect to a 10 kΩ pull-down resistor or connectdirectly to V SS.Figure 3-1. Pin I/O CircuitsSchmitt-triggered input with hysteresis characteristicsType 2INType 2-EDataOutputdisableInputenableV DDP-chIN/OUTN-chV SSDataOutputdisableV DDP-chIN/OUTN-chV SSType 5Type 8V DDPull-up resistor(mask option)IN
