¡ Semiconductor

MSM58321

8

PIN CONFIGURATION

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

WRITE

READ

GND

XT

XT

TEST

STOP

BUSY

ADDRESS WRITE

16 pin Plastic DIP (top View)

Note:

REGISTER TABLE

Address

Address input

Register

Name

Data input/

output

Count value

Remarks

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E~F

D2 = 1 specifies PM, D2 = 0 specifies AM, D3 = 1 specifies 24-hour timer, and

D3 = 0 specifies 12-hour timer.

When D3 = 1 is written, the D2 bit is reset inside the IC.

The D2 and D3 bits in D10 are used to select a leap year.

circuit. They are reset when this code is latched with ADDRESS LATCH and

the WRITE input goes to 1.

A selector to obtain reference signal output. Reference signals are output to

D0 – D3 when this code is latched with ADDRESS LATCH and READ input

goes to 1.

0

1

0

1

0

0

0

1

1

0

0

0

0

0

1

0

0

0

0

0

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

0

1

0

1

0

1

0

1

1

0

0

1

1

0

1

1

0

0

0

0

1

0

0

1

1

1

1

1

10

1

0

W

**

**

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

Calendar

Remainder obtained by dividing the

year number by 4

Gregorian calendar

0

1

0

1

0

0

1

1

0

3

2

1

0~1 or 0~2

0

to

9

0

to

5

0

to

9

0

to

5

0

to

9

0

to

6

0

to

9

0

to

3

0

to

9

0

to

1

0

to

9

0

to

9

10

1

1

0/1

1

1

1

(1)

There are no bits in blank fields for data input/output. 0 signals are output by reading and data is

not stored by writing because there are no bits.

The bit with marked

*

is used to select the 12/24-hour timer and the bits marked

*

are

used to select a leap year. These three bits can be read or written.

When signals are input to bus lines D0 – D3 and ADDRESS WRITE goes to 1 for address input,

ADDRESS information is latched with ADDRESS LATCH.

(2)

(3)