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NJU6350 PDF даташит

Спецификация NJU6350 изготовлена ​​​​«New Japan Radio» и имеет функцию, называемую «SERIAL I/O REAL TIME CLOCK».

Детали детали

Номер произв NJU6350
Описание SERIAL I/O REAL TIME CLOCK
Производители New Japan Radio
логотип New Japan Radio логотип 

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NJU6350 Даташит, Описание, Даташиты
NJU6350
SERIAL I/O REAL TIME CLOCK
s GENERAL DESCRIPTION
s PACKAGE OUTLINE
The NJU6350 is a serial I/O Real Time Clock suitable for
4 bits micro-processor.
It contains quartz crystal oscillator, counter, shift register,
voltage regulator, voltage detector, and interface controller.
The NJU6350 required only 3-port of microprocessor for
data transfer, and the microprocessor can receive the data
at any time when the microprocessor requires.
The operating voltage is as wide as 2.0V to 5.5V,
consequently, the NJU6350 can count accurate time data
even if the back up period.
Furthermore, the long time back up is available as the
current consumption during the back up period is less than
2µA.
NJU6350R
NJU6350C
s FEATURES
q Operating Voltage
: 3.0V ± 20%
2.0V to 5.5V ( The clock operation )
q Low operating current : 0.8 µA ( Typ. ) at 2.0V
2.0 µA ( Max. ) at 2.0V
q BCD Counts of Seconds, Minutes, Hours, Days of Week,
Date, Month and Year
q Required only 3-port ( DATA, CLK and CE )
q Low Battery Detector ( Low voltage alarm signal output )
q Automatic Leap Year Compensation : Up to AD 2099
q Package Outline
: VSP 8 / Chip
q C-MOS Technology
s PIN CONFIGURATION
FOUT 1
XT 2
XT 3
VSS 4
8 XDD
7 DATA
6 CLK
5 CE









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NJU6350 Даташит, Описание, Даташиты
NJU6350
s BLOCK DIAGRAM
XT Oscillator
XT Divider
VSS
VDD
Low Voltage
Detector
Fout
Timer Counter
sec. min. hour day date month year
Controller
DATA
CLK
CE
s TERMINAL DESCRIPTION
No. SYMBOL
1 Fout
2 XT
3 XT
4 VSS
5 CE
6 CLK
7 DATA
8 VDD
I/O
O
I
O
Power
I
I
I/O
Power
FUNCTION
Oscillator output terminal.
ON :It outputs oscillator signal , frequency 32.768kHz.
OFF :It is in high impedance status.
Quartz crystal connect terminal ( f = 32.768kHz ).
GND
Chip enable terminal ( With pull-down resistor ).
" H " : Data input/output available
" L " : Data terminal is in high impedance status.
When the data input/output is executed consequently, the CE terminal should be
set to " L " level at the data transmission interval.
Clock terminal.
The Data Input/Output is synchronized by this clock. When the CE terminal is "L",
the data input is not available.
When the CE signal which is raising edge or falling edge, the CLK signal should
be fixed to " L ".
Serial timer data input/output terminal.
This terminal is switched to input or output by system control data. (Defult : input)
When the CE terminal is set to " L ", the data terminal is high impedance.
Power supply
The rising time of VDD should be less than 10mS.









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NJU6350 Даташит, Описание, Даташиты
NJU6350
s FUNCTIONAL DESCRIPTION
1. Timer and System control data format
The NJU6350 adopts BCD code consisting of 4 bits per digit.
The calendar function including the last date of each month and the leap year calculation is executed
automatically. The system control data operates Data I/O mode set, Oscillator output set and Test mode set.
The unused bit for the Timer and System control data is always set to “ 0 ”.
< System control data format >
System control data block
C2 C1 C0 RW
0 0 01
MSB
LSB
C2 C1 C0 RW
Contents
Writing the data of oscillator output / test mode set
F = " 0 " : Oscilator output off (high impedance status)
F = " 1 " : Oscilator output on
T0 to 6:Test mode set ( Normaly all " 0 " )
MSB
F T6 T5 T4 T3 T2 T1
0 0 1 1 Writing the data of " Year "
0 1 0 1 Writing the data of " Month "
0 1 1 1 Writing the data of " Date "
1 0 0 1 Writing the data of " Days of Week "
1 0 1 1 Writing the data of " Hour "
1 1 0 1 Writing the data of " Minute "
1 1 1 1 Writing the data of " Second "
0 0 1 0 Reading the data of " Year "
0 1 0 0 Reading the data of " Month "
0 1 1 0 Reading the data of " Date "
1 0 0 0 Reading the data of " Days of Week "
1 0 1 0 Reading the data of " our "
1 1 0 0 Reading the data of " Minute "
1 1 1 0 Reading the data of " Second "
0 0 0 0 nvalidity
LSB
T0
< Timer data format >
MSB
LSB Range
Second
0 S6 S5 S4 S3 S2 S1 S0 0 59
Minute
0 m6 m5 m4 m3 m2 m1 m0 0 59
Hour
0 0 H5 H4 H3 H2 H1 H0 0 23
Days of Week
DC W2 W1 W0 1 7
Date
0 0 D5 D4 D3 D2 D1 D0 1 31
Month
0 0 0 M4 M3 M2 M1 M0 1 12
Year
Y7 Y6
Y5
Y4
Y3
Y2
Y1
Y0 0 99
Note1) The bit of " DC " in the " Days of Week " is a flag as the result of Low Voltage Detection. If the supply
voltage is reduced to the detection voltage level, then the flag of " DC " is set to "1" at the read operation,
and else the flag is always " 0 ".
(Note2) Only the data of Sec.., ..,Year as data of Timer and Calendar must be written to the NJU6350 why any
other data will be causes in malfunction of the timer counter.










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