NJU6355

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sTREMINAL DESCRIPTION

No.

SYMBOL

FUNCTION

1

I/O

Input/Output Select Terminal for DATA Terminal

"H" : Input,

"L" : Output

During the CE terminal is "L", the DATA terminal is high impedance.

2

XT

3

XT

Quartz Crystal Connecting Terminal (f=32.768kHz)

Refer to the line-up table for internal Cg, Cd value.

5

CE

Chip Enable Input Terminal (with Pull-down Resistance)

"H" : DATA input/output is available.

"L" : DATA terminal is high impedance.

When the CE signal is which rising edge or falling edge,

the CLK signal should be fixed to "L".

6

CLK

Clock Input Terminal

The DATA input/output is synchronized this clock.

When the CE terminal is "L" the DATA terminal is high impedance.

I/O

CE

DATA

H

H

Input

L

H

Output

H

L

High Impedance

L

L

High Impedance

7

DATA

Serial Timer Data Input/Output Terminal

8

Power Supply

4

GND

sFUNCTIONAL DESCRIPTION

1. Timer Data Structure

The NJU6355 using BCD code which consisting of 4 bits per 1 digit.

The calender function including the last

date of each month and the leap year calculation is executed automatically.

The unused bit for the timer data is

“0”.

Timer Data Bit Map

MSB

LSB

Range

Second

0

S6

S5

S4

S3

S2

S1

S0

0 to 59

Minute

0

m6 m5 m4 m3 m2 m1 m0

0 to 59

Hour

0

0

H5

H4

H3

H2

H1

H0

0 to 23

Days of Week

0

W2 W1 W0

1 to 7

Day

0

0

D5

D4

D3

D2

D1

D0

1 to 31

Month

0

0

0

M4 M3 M2 M1 M0

1 to 12

Year

Y7

Y6

Y5

Y4

Y3

Y2

Y1

Y0

0 to 99