■ GENERAL DESCRIPTION
The NJU3502 is the C-MOS 4-bit Single Chip Micro Controller consisting of the 4-bit CPU Core, Input / Output Selectable I/O ports, Program ROM, Data RAM, Timer, 8-bit Serial Interface, and Oscillator Circuit (CR or Ceramic or Xtal). It realizes the control for home appliances or toys by only few external components.
The NJU3502 is suitable for battery operated appliances because of low operating current, wide operating voltage range, and STANDBY function(HALT mode).

■ FEATURES
● Internal Program ROM 1024 X 8 bits
● Internal Data RAM 64 X 4 bits
● Input / Output Port 17 lines(MAX)
   10 lines Input / Output direction of each bit is
                selected by the mask option.
   4 lines Input / Output direction of 4-bit lines group
               can be changed by the program.
   Additional functions by the mask option.
        External Interrupt Terminal : EXTI/PE0
        Serial Interface Terminals
                                : SDO/PF0, SDI(O)/PF1
● High Output-Current terminal (4 lines)
   N-Channel FET Open Drain Type (IOL)
                                   15mA at VDD=5V
● Instruction Set 59 instructions
● Subroutine Nesting 8 levels
● Pulse Edge Detector
   The rising or falling edge of a pulse is selected by
   the mask option.
● Instruction Executing Time 6/fOSC sec
● Operating Frequency Range 30kHz − 4MHz
● Internal Oscillator
   CR, or Ceramic, or Xtal oscillation and External clock input
● STANDBY function (HALT mode)
● Wide operating voltage range 2.4V − 5.5V
● 8-bit Serial Input / Output port
● Timer (8-bit re-load type timer)
● Interrupt factor 3(external, timer, serial Input / Output)
● C-MOS technology
● Package outline SDIP / DMP24