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EM78811

8-BIT MICRO-CONTROLLER FOR TELECOM PRODUCT

ELAN Microelectronics 

EM78811

8-BIT MICRO-CONTROLLER FOR TELECOM PRODUCT

• Bit7 IDLE : Sleep mode selection bit

0/1=sleep mode/IDLE mode. This bit will decide SLEP instruction which mode to go.

These two modes can be waken up by TCC clock or Watch Dog or PORT9 and run from "SLEP" next

instruction.

TCC time out

WDT time out

Port9 wake-up

SLEEP moe

RA(7,6)=(0,0)

+SLEP

X

RESET

RESET

IDLE mode

RA(7,6)=(1,0)

+SLEP

Wake-up

+Interrupt

+Next instruction

Wake-up

+Next instruction

Wake-up

+Next instruction

GREEN mode

RA(7,6)=(x,0)

no SLEP

Interrupt

RESET

RESET

NORMAL mode

RA(7,6)=(x,1)

no SLEP

Interrupt

RESET

RESET

RB(DTMF tone row and column register) (read/write)

7

6

5

4

3

2

1

0

c7

c6 c5 c4 r3

r2

r1 r0

• Bit 0 - Bit 3 are row-frequency tone.

• Bit 4 - Bit 7 are column-frequency tone.

• Initial RB is equal to high. Bit7~0 are all "1", turn off DTMF power.

bit3~0

1110

1101

1011

0111

Column freq

bit 7~4

Row freq

699.2 Hz

771.6 Hz

854 Hz

940.1 Hz

1

4

7

*

1203 Hz

1110

2

5

8

0

1331.8 Hz

1101

3

6

9

#

1472 Hz

1011

A

B

C

D

1645.2 Hz

0111

RC(CALLER ID address)(read/write)

7

6

5

4

3

2

1

0

CIDA7 CIDA6 CIDA5 CIDA4 CIDA3 CIDA2 CIDA1 CIDA0

• Bit 0 ~ Bit 7 select CALLER ID RAM address up to 256.

RD(CALLER ID RAM data)(read/write)

• Bit 0 ~ Bit 8 are CALLER ID RAM data transfer register.

User can see IOCA register how to select CID RAM banks.

RE(LCD Driver,WDT Control)(read/write)

7

6

5

4

3

2

1

0

- /WDTE /WUP9H /WUP9L /WURING LCD_C2 LCD_1 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_C2,LCD_C1” to “00”.

* This specification are subject to be changed without notice.

10.12.1998 9

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