NJU3502
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TERMINAL DESCRIPTION 1
No.
SYMBOL
INPUT/OUTPUT
F U N C T I O N
22
23
1
2
PC0
PC1
PC2
PC3
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
4-bit Input / Output PORTC.
Selects a terminal circuit for each port from follows by the
mask option.
x
C-MOS Input Terminal with Pull-up Resistance(IA)
x
C-MOS Input Terminal(IC)
x
C-MOS Output Terminal(OB)
3
4
PD0
PD1
INPUT/OUTPUT
INPUT/OUTPUT
2-bit Input / Output PORTD.
Selects a terminal circuit for each port from follows by the
mask option.
x
C-MOS Schmitt Trigger Input Terminal with
Pull-up Resistance(IB)
x
C-MOS Schmitt Trigger Input Terminal(ID)
x
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.
5
6
7
8
PA0
PA1
PA2
PA3
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
INPUT/OUTPUT
4-bit Input / Output PORTA.
Selects a terminal circuit for each port from follows by the
mask option.
x
C-MOS Input Terminal with Pull-up Resistance(IA)
x
C-MOS Input Terminal(IC)
x
C-MOS Output Terminal(OB)
9
TEST INPUT
Maker Testing Terminal with Pull-down Resistance
The terminal is recommended to connect to GND.
10
11
OSC1
OSC2
INPUT
OUTPUT
Internal Oscillator Terminals.
Connects a device selected from the ceramic or the crystal
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.
12
V
SS
Power Source (0V)
13
RESET
INPUT
RESET Terminal.
When the low level input-signal, the system is initialized.
14
EXTI / PE0
INPUT
1-bit Input PORTE.
Selects a function of either 1) or 2) for PORTE by the mask
option.
1) External Interrupt Input Terminal with Pull-up Resistance.
:EXTI
2) 1-bit Input Terminals as PORTE
Selects a terminal circuit for each port from follows by the
mask option.
x
C-MOS Schmitt Trigger Input Terminal with
Pull-up Resistance(IB)
x
C-MOS Schmitt Trigger Input Terminal(ID)
Note )
INPUT/OUTPUT : Input or Output is selected by the mask option.
INOUT
: Input or Output is changed by the program.
NJU3502
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TERMINAL DESCRIPTION 2
No.
SYMBOL
INPUT/OUTPUT
F U N C T I O N
15
16
SDO / PF0
SDI(O) / PF1
SDO :OUTPUT
PF0 :OUTPUT
SDI(O) :INOUT
PF1 :
INPUT/OUTPUT
2-bit Input / Output PORTF.
Selects a function of either 1) or 2) for PORTF by the mask
option.
1) Serial Interface Function
Serial Data Output Terminal : SDO
Serial Data Input-Output Terminal with Pull-up
Resistance : SDI(O)
2) 2-bit Input / Output Terminals as PORTF.
Selects a terminal circuit for each port from follows by the
mask option.
x
C-MOS Input Terminal with Pull-up Resistance (IA):PF1
x
C-MOS Input Terminal(IC):PF1
x
C-MOS Output Terminal(OB):PF0,PF1
17
SCK /
CKOUT
SCK :INOUT
CKOUT :
OUTPUT
Selects a function of either 1) or 2) by the mask option.
1) Serial Clock Input or Output Terminal with Pull-up
Resistance. :SCK
2) Clock Divided by Pre-scaler Output Terminal with Pull-up
Resistance. :CKOUT
Selects the dividing times of the clock in the pre-scaler by the
mask option.
18
19
20
21
PB0
PB1
PB2
PB3
INOUT
INOUT
INOUT
INOUT
4-bit Programmable Input / Output PORTB
These 4-bit terminals' direction can be changed by the
program as 4-Input or 4-Output.
Use of Pull-up resistance is in accordance with the mask
option.
x
as Input : C-MOS Input Terminals
x
as Output: Nch-FET Open-Drain Output Terminal
24
V
DD
Power source (2.4V to 5.5V)
Note )
INPUT/OUTPUT : Input or Output is selected by the mask option.
INOUT
: Input or Output is changed by the program.
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