58

Real time clock module

R/W

E

4V

4V

2 to 4V

≤

Data holding mode

Interface possible

with external

terminals

Interface possible

with the external

terminals

Read mode

Write mode

Data hoiding timing

Switching characteristics

Register table

R/W

E

Motorola bus system

Switching characteristics on the Intel bus system are the same as those for the RTC-6242 series.

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

Symbol

of

register

R-W

∗

∗

∗

∗

IRQ

⋅

___

r-

PM/AM

∗

RESET

STOP

IRQ

⋅

30 sec.

ADJ

IRQ

⋅

READ

FLAG

Real time

register name

1 - sec. digit register

10 - sec. digit register

1 - min. digit register

10 - min. digit register

1 - hour digit register

10 - hour digit register

1 - day digit register

10 - day digit register

1 - month digit register

10 - month digit register

1 - year digit register

10 - year digit register

Week register

Control register D

Control register E

Control register F

Item

__

R/W, address setup time

E “H” pulse width

__

R/W, address hold time

E “L” pulse width

E cycle time

DATA setup time

DATA hold time

E to data (CL=150pF)

Data hold

Symbol

Min.

100

220

20

220

500

180

20

––

10

Max.

––

120

––

Unit

ns

BANK 0

Symbol

of

register

A-W

A-EMB

∗

∗

∗

∗

∗

HD/SFT

___

a-

PM/AM

∗

__

24/12

CAL

D

⋅ P

Alarm

register name

1 - sec. digit register

10 - sec. digit register

1 - min. digit register

10 - min. digit register

1 - hour digit register

10 - hour digit register

1 - day digit register

10 - day digit register

1 - month digit register

10 - month digit register

Week register

Area define register

Test register

Control register D

Control register E

Control register F

BANK 1

Same as BANK 0

∗

∗

∗