beautypg.com

FUJITSU MB91460 SERIES FR60 User Manual

Page 860

background image

844

Chapter 41 Up/Down Counter

4.Register

To enable interrupt requests, the interrupt request permission bit must be set (UDIE= “1”).

• bit1,0: Up/down flag

UDF1

UDF0

Previous count operation

0

0

No input

0

1

Count down

1

0

Count up

1

1

Both of count up and count down