CHAPTER 2 PIN FUNCTIONSUser’s Manual U16227EJ2V0UD382.3 Pin I/O Circuits and Recommended Connection of Unused PinsTable 2-2 shows the types of pin I/O circuits and the recommended connections of unused pins.Refer to Figure 2-1 for the configuration of the I/O circuit of each type.Table 2-2. Pin I/O Circuit TypesPin Name I/O Circuit Type I/O Recommended Connection of Unused PinsP00/TI000P01/TI010/TO008-AP12/SO10P13/TxD65-AP14/RxD6 8-AP15/TOH0 5-AP16/TOH1/INTP5P17/TI50/TO508-AI/O Input: Independently connect to EV DD or EV SS via a resistor.Output: Leave open.P20/ANI0 to P27/ANI7 9-C Input Connect to EV DD or EV SS.P30/INTP1 to P32/INTP3P33/TI51/TO51/INTP48-A Input: Independently connect to EV DD or EV SS via a resistor.Output: Leave open.P60, P61 (Mask ROM version) 13-SP60, P61 (Flash memory version) 13-RP62, P63 (Mask ROM version) 13-VP62, P63 (Flash memory version) 13-WInput: Connect to EV SS.Output: Leave this pin open at low-level output after clearingthe output latch of the port to 0.P70/KR0 to P73/KR3P120/INTP08-AI/OInput: Independently connect to EV DD or EV SS via a resistor.Output: Leave open.P130 3-C Output Leave open.RESET 2 −XT1InputConnect directly to EV DD or V DD .XT216Leave open.AV REF Connect directly to EV DD or V DDNote.AV SSICConnect directly to EV SS or V SS.V PP−−Connect to EV SS or V SS.Note Connect port 2 directly to EVDD when it is used as a digital port.
