BU9728 데이터 시트보기 (PDF) - ROHM Semiconductor

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BU9728

For 128～ 140 Segment type LCD, LCD Segment Driver

ROHM Semiconductor 

* BU9795AFV

As SEG0, SEG1, SEG2, SEG3, SEG31, SEG32, SEG33, SEG34 are not output, these

address will be dummy address.

Dummy data

DDRAM address

Dummy data

00h 01h 02h 03h 04h 05h 06h 07h ・・・・・・・・ 1Eh 1Fh 20h 21h 22h

0a e i m q u

COM0

1b f j n r v

BIT 2 c

g

k

o

s

x

COM1

COM2

3d h l p t y

COM3

SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7

・・・・・・・・

SEG30 SEG31 SEG32 SEG33 SEG34

As data transfer to DDRAM happens every 4bit data, it will be cancelled if it changes

CSB=”L”→”H” before 4bits data transfer.

* BU9795AGUW

As SEG0, SEG1, SEG33, SEG34 are not output, these address will be dummy address.

Dummy data

DDRAM address

Dummy data

00h 01h 02h 03h 04h 05h 06h 07h ・・・・・・・・ 1Eh 1Fh 20h 21h 22h

0a e i m q u

COM0

1b f j n r v

BIT 2 c

g

k

o

s

x

COM1

COM2

3d h l p t y

COM3

SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7

・・・・・・・・

SEG30 SEG31 SEG32 SEG33 SEG34

As data transfer to DDRAM happens every 4bit data, it will be cancelled if it changes

CSB=”L”→”H” before 4bits data transfer.

○ Reset (initial) condition

Initial condition after execute Software Reset is as follows.

・ Display is OFF.

・ DDRAM address is initialized (DDRAM Data is not initialized).

・ Refer to Command Description about initialize value of register.

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