ST7066

V1.2

2000/6/13

16

DL : Interface data length control bit

When DL = "High", it means 8-bit bus mode with MPU.

When DL = "Low", it means 4-bit bus mode with MPU. So to speak, DL is a signal to select

8-bit or 4-bit bus mode.

When 4-bit bus mode, it needs to transfer 4-bit data by two times.

N : Display line number control bit

When N = "Low", it means 1-line display mode.

When N = "High", 2-line display mode is set.

F : Display font type control bit

When F = "Low", it means 5 x 8 dots format display mode

When F = "High", 5 x11 dots format display mode.

N

F

No. of Display

Lines

Character Font

Duty Factor

L

L

1

5x8

1/8

L

H

1

5x11

1/11

H

x

2

5x8

1/16

!

!

!

!"

"

"

" Set CGRAM Address

Set CGRAM address to AC.

This instruction makes CGRAM data available from MPU.

!

!

!

!"

"

"

" Set DDRAM Address

Set DDRAM address to AC.

This instruction makes DDRAM data available from MPU.

When 1-line display mode (N = 0), DDRAM address is from "00H" to "4FH".

In 2-line display mode (N = 1), DDRAM address in the 1st line is from "00H" to "27H", and

DDRAM address in the 2nd line is from "40H" to "67H".

0

0

1

AC6 AC5 AC4 AC3 AC2

Code

RS

RW

DB7

DB6

DB5

DB4

DB1

DB2

DB3

AC1 AC0

DB0

0

0

0

1

AC5 AC4 AC3 AC2

Code

RS

RW

DB7

DB6

DB5

DB4

DB1

DB2

DB3

AC1 AC0

DB0