NJU6624B データシートの表示（PDF） - Japan Radio Corporation

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NJU6624B

12-CHARACTER 1-LINE DOT MATRIX LCD CONTROLLER DRIVER with SMOOTH SCROLL FUNCTION

Japan Radio Corporation  

NJU6624A/B

Example of 2 dot smooth scroll

The smooth scroll sequence, which is executed by the 2dot-shift and 4dot-shift instruction, LCD display and DD

RAM address movement are shown as follows.

Power ON

Display ON/OFF

Write data to

DD RAM

< LCD Display >

<DD RAM address>

Setting address in (AC)

Scroll

RAM

1ch 2 3

10 11 12

00 01 02 ---- 09 0A 0B 0C 0D

RAM address set

Set the address

(0C)H to DDRAM

00 01 02 ---- 09 0A 0B 0C 0D

NOTE) The address set instruction for scroll RAM is not needed later on.

For example, the address (0D)‚ auto-increments to (00)‚ at the timing of the write to

RAM instruction, then the address (00)‚ returns to 1st line scroll RAM position by the

display shift instruction.

Write to RAM

write character code

to the address (0C)H

(0D)H.

Dot Shift

2dot-shift

00 01 02 ---- 09 0A 0B 0C 0D

Dot Shift

4dot-shift

00 01 02 ---- 09 0A 0B 0C 0D

Display Shift Seems to execute

2dot-shift

Write to RAM

write character code

to the address (00)H.

01 02 03 ---- 0A 0B 0C 0 D 00

Dot Shift

2dot-shift

Dot Shift

4dot-shift

Display Shift Seems to execute

2dot-shift

Write to RAM write character code

to the address (00)H.

01 02 03 ---- 0A 0B 0C 0D 00

01 02 03 ---- 0A 0B 0C 0D 00

02 03 04 ---- 0B 0C 0D 00 01

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