MSM6242B 查看數據表（PDF） - Oki Electric Industry

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MSM6242B

DIRECT BUS CONNECTED CMOS REAL TIME CLOCK/CALENDAR

Oki Electric Industry 

¡ Semiconductor

REGISTER TABLE

MSM6242B

Address Input

Address

Register

Input A3 A2 A1 A0 Name D3

0

00 00

S1

S8

1

00 01

S10

*

2

00 10

MI1

mi8

3

0 0 1 1 MI10

*

4

01 00

H1

h8

Data

D2 D1

Count

D0 value

Description

S4 S2 S1 0 to 9 1-second digit register

S40 S20 S10 0 to 5 10-second digit register

mi4 mi2 mi1 0 to 9 1-minute digit register

mi40 mi20 mi10 0 to 5 10-minute digit register

h4 h2 h1 0 to 9 1-hour digit register

5

01 0 1

H10

*

PM/

AM

h20

h10

0 to 2 PM/AM, 10-hour digit

or 0 to 1

register

6

0110

D1

d8

d4

d2

d1 0 to 9 1-day digit register

7

0111

D10

*

*

d20 d10 0 to 3 10-day digit register

8

1 0 0 0 MO1 mo8 mo4 mo2 mo1 0 to 9 1-month digit register

9

1 0 0 1 MO10

*

*

* MO10 0 to 1 10-month digit register

A

1010

Y1

y8

y4

y2 y1 0 to 9 1-year digit register

B

1011

Y10

y80

y40

y20

y10

0 to 9 10-year digit register

C

1100

W

*

w4 w2 w1 0 to 6

Week register

30 IRQ

D

1 1 01

CD

sec. FLAG BUSY HOLD —

Control Register D

ADJ

E

1 1 10

CE

t1

t0

ITRPT

/STND

MASK

—

Control Register E

F

1111

CF TEST 24/12 STOP REST —

Control Register F

REST = RESET

ITRPT/STND = INTERRUPT/STANDARD

Note 1)

Note 2)

Note 3)

Note 4)

Bit * does not exist (unrecognized during a write and held at "0" during a read).

Be sure to mask the AM/PM bit when processing 10's of hour's data.

BUSY bit is read only. The IRQ FLAG bit can only be set to a "0". Setting the IRQ FLAG to a "1" is done by

hardware.

PM at 1 and AM at 0 for PM / AM bit.

Figure 1. Register Table

25

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