EM78860 Ver la hoja de datos (PDF) - ELAN Microelectronics

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EM78860

8-BIT MICRO-CONTROLLER

ELAN Microelectronics 

EM78860

8-BIT MICRO-CONTROLLER

LCD Driver Control

RE(LCD Driver Control)(initial state “00000000”)

7

6

5

4

-

-

-

-

3

2

1

0

-

LCD_C2 LCD_C1 LCD_M

• Bit0 (LCD_M):LCD_M decides the methods, including duty, bias, and frame frequency.

• Bit1~Bit2 (LCD_C#):LCD_C# decides the LCD display enable or blanking. change the display duty must set

the LCD_C to “00”.

LCD_C2,LCD_C1

00

01

11

LCD Display Control

change duty

Disable(turn off LCD)

Blanking

LCD display enable

LCD_M

0

1

:

:

duty bias

1/16 1/4

1/8 1/4

:

:

LCD display area

The LCD display data is stored in the data RAM . The relation of data area and COM/SEG pin is as below:

COM15 ~ COM8

40H (Bit15 ~ Bit8)

41H

:

:

7BH

7CH

7DH

7EH

7FH

COM7 ~ COM0

00H (Bit7 ~ Bit0)

01H

:

:

3BH

3CH

3DH

3EH

3FH

SEG0

SEG1

:

:

SEG59

empty

empty

empty

empty

• IOCB(LCD Display RAM address)

7

6

5

4

3

2

1

0

-

LCDA6 LCDA5 LCDA4 LCDA3 LCDA2 LCDA1 LCDA0

Bit 0 ~ Bit 6 select LCD Display RAM address up to 120.

LCD RAM can be write whether in enable or disable mode and read only in disable mode.

• IOCC(LCD Display data) : Bit 0 ~ Bit 8 are LCD data.

LCD COM and SEG signal

• COM signal : The number of COM pins varies according to the duty cycle used, as following: in 1/8 duty mode

COM8 ~ COM15 must be open. in 1/16 duty mode COM0 ~ COM15 pins must be used.

* This specification are subject to be changed without notice.

6.24.1998 19

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