-5 -

NJU3426

(4) DISPLAY SHIFT OPERATION

The display shift operation can be performed by changing the “Initial character address” of the “Command register 2”.

And, the number of digits for the display shift in the loop is determined by the “Shifting display digits” of the

“Command register 1”.

In other words, shifting display area ranges from the “Initial character address” specified by the

“Command register 2” to the last address designated by the “Command register 1”.

In

addition, supposing that the value of the “Shifting display digits” is “N”, the “Initial character address” must be set in the

Because the display shift operation doesn’t apply to the

addresses beyond the range of the digit “N”, the display images, initially set, appear on these addresses.

Just for

reference, one character of display image is composed of 16 segments.

HOW TO SET LEFT DISPLAY SHIFT

To the contrary, decrementing the address performs right display shift.

The following description

provides the example on how to set the left display shift, using alphanumeric display images such as “0”, “1”,

“2”, ---, “9”, “A”, “B”, ---, and “E”.

STEP1) Setting display images in the display data RAM

•

Display RAM data

Character address

Display image

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

is not shifted.

character addresses are outside of the digit “N”.

is not shifted.

Shifting display digits

Character

address

Timing output

terminals

Character

Display image

1

2

11

12

13

14

Shifting display digits

Character

address

Timing output

terminals

Character

Display image

1

2

11

12

13

14