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NJU3503L

4-BIT SINGLE CHIP MICRO CONTROLLER

Japan Radio Corporation  

NJU3503

s TERMINAL DESCRIPTION 3

No.

NJU NJU

3503M 3503L

24 22

SYMBOL INPUT/OUTPUT

FUNCTIONS

SCK/CKOUT SCK :INOUT Selects a function of either of 1) or 2) by the mask option.

CKOUT :

1) Serial Clock Input or Output Terminal with Pull-up

OUTPUT Resistance. : SCK (SCP,SC)

2) Clock Divided by Prescaler Output Terminal.

Selects the dividing times of the clock in the prescaler

by the mask option. : CKOUT

25 23

26 24

27 25

28 26

29 27

30 28

Note )

PA0

PA1

PA2

PA3

RESET

VDD

INOUT

INOUT

INOUT

INOUT

INPUT

–

4-bit Programmable Input / Output PORTA.

These 4-bit terminals direction can be changed by the

program as each terminal of Input or Output.

Use of Pull-up resistance for a terminal is in accordance

with the mask option.(IOP,IO)

•as Input : C-MOS Input Terminals

•as Output: Nch-FET Open-Drain Output Terminals

RESET Terminal.

When the low level input-signal, the system is initialized.

Power Source (2.4V − 5.5V)

INPUT/OUTPUT : Input or Output is selected by the mask option.

INOUT : Input or Output is changed by the program.

“ISP, IS, ICP, IC, IOP, IO, OC, ONP, ON, ACP, AC, AD, IIP, II, SO, SDP, SD, SCP, SC” are

symbols using on MASK OPTION GENERATOR(MOG).

-6-

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