Epson RTC-72421 A Manuel D’Utilisation

RTC - 72421 / 72423 

 

 

Page - 15 

MQ - 162 - 03 

 

 
(A)Starting the count 

 

START

Set the C

F

 register

Reg.F

TEST
24/12
STOP
RESET

Reg.D

30 s ADJ
IRQ FLAG
HOLD

To next process

0

0

0
0 or 1

0*00B

This setting is not necessary when
the STD.P pin is not used

0

0
0 or 1

0*00B

←

←

←

←

←

←

←

←

←

Set the IRQ FLAG bit to 0 when fixed-period
interrupt mode is used, or to 1when it is not
used.

Set the C

E

 register

Set the C

D

 register

 

 
 
 

(B) Checking the status of the BUSY bit 

 

START

To next process

HOLD bit 

←

 1

Read the BUSY bit

BUSY bit=0?

NO

YES

HOLD bit 

← 

0

 

 
 
 

(C)Stopping and resetting the counter 
 

START

To next process

Set the C

F

 register

Reg.F

TEST
24/12
STOP
RESET

1

1

0
0 or 1

0*11B

←
←

←

←

←