NJU3101 n TERMINAL DESCRIPTION No. SYMBOL 1 PA0 2 PA1 3 PA2 4 PA3 INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT INPUT/OUTPUT FUNCTION 4-bit Input / Output PORTA. Selects a terminal circuit for PORT grouped with 4 lines from follows by the mask option. · C-MOS Input Terminal with Pull-up Resistance(IA) · C-MOS Input Terminal(IC) · C-MOS Output Terminal(OB) Maker Testing Terminal with Pull-down Resistance 5 TEST INPUT The terminal is recommended to connect to GND. Internal Oscillator Terminals. 6 OSC1 INPUT Connects a device selected from the ceramic or the crystal 7 OSC2 OUTPUT resonator, or the resistor, to these terminals for the internal oscillator. In the external clock operation, OSC1 is the external clock input terminal and OSC2 is normally open terminal. VSS – Power Source (0V) 8 9 INPUT RESET Terminal. RESET When the low level input-signal, the system is initialized. 10 PB0 INPUT/OUTPUT 1-bit Input / Output PORTB and PORTC. Selects a terminal circuit for each PORT from follows by the 11 PC0 INPUT/OUTPUT mask option. · C-MOS Input Terminal with Pull-up Resistance(IA) · C-MOS Input Terminal(IC) · Nch-FET Open-Drain Output Terminal with Pull-up Resistance(OA) · Nch-FET Open-Drain Output Terminal(OC) 12 PD0 INPUT/OUTPUT 2-bit Input / Output PORTD. Selects a terminal circuit for PORT grouped with 2 lines from 13 PD1 follows by the mask option. · C-MOS Input Terminal with Pull-up Resistance(IA) · C-MOS Input Terminal(IC) · C-MOS Output Terminal(OB) When the ports are selected as the input terminal, PD0 operates also as RESTART signal input terminal to return from STANDBY mode, and PD1 operates also as the Edge Detector Terminal. 14 PE0 INPUT/OUTPUT 2-bit Input / Output PORTE. Selects a terminal circuit for PORT grouped with 2 lines from 15 PE1 INPUT/OUTPUT follows by the mask option. · C-MOS Schmitt Trigger Input Terminal with Pull-up Resistance(IB) · C-MOS Schmitt Trigger Input Terminal(ID) · C-MOS Output Terminal(OB) VDD – Power Source (2.4V to 5.5V) 16 Note ) INPUT/OUTPUT : Input or Output is selected by the mask option. 3 /3 NJU3101 MEMO [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.