EM78P813

8-bit OTP Micro-controller

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* This specification is subject to change without notice.

33

2004/8/19

(V1.6)

PAGE2 KEY Strobe Control Register

7

6

5

4

3

2

1

0

STRB15 STRB14 STRB13 STRB12 STRB11 STRB10

STRB9

STRB8

Bit 0 ~ Bit 7 (STRB8 ~ STRB15) : Key strobe control bits

These key strobe control registers correspond to SEGMENT58 ~ SEGMEN65 or Port90 ~ Port97 (decided by

CHIPSEL pin). Please refer KEYSTOBE explanation (RE page3).

PAGE3 Undefined Register

7

6

5

4

3

2

1

0

0

0

0

X

0

0

0

0

Bit 0~3, 5~7: Undefined register. These bits must keep to 0.

RD PORT D I/O Data , Data RAM address , LCD control

PAGE0 PORT D I/O Data , Data RAM address

7

6

5

4

3

2

1

0

PD7

PD6

PD5

PD4

PD3

PD2

PD1

PD0

Bit 0 ~ Bit 7 (PD0 ~ PD7) : 7-bit PORTD ( 0~6 ) I/O data register

User can use IOC register to define input or output each bit.

PAGE1 Data RAM Address1(Low 8 bits)

7

6

5

4

3

2

1

0

RAM1A7 RAM1A6 RAM1A5 RAM1A4 RAM1A3 RAM1A2 RAM1A1 RAM1A0

Bit 0~Bit 7 (RAM1A0 ~ RAM1A7) : Data RAM address1 (address0 to address7) for RAM reading or writing

PAGE2 LCD Control Register

7

6

5

4

3

2

1

0

-

IRS1

IRS0

Bias4

Bias3

Bias2

Bias1

Bias0

Bit 0 ~ Bit 4 (Bias0 ~ Bias4) : LCD operation voltage selection

About the relation with VDD and V1 , please refer Fig.20 and 21.

(Bias4 to Bias0)

VEV voltage

V1(1+Rb/Ra ratio = 2)

00000

Vref * (1-2/100)

5.29V

00001

Vref * (1-3/100)

5.24V

00010

Vref * (1-4/100)

5.18V

00011

Vref * (1-5/100)

5.13V

00100

Vref * (1-6/100)

5.08V

:

:

:

11101

Vref * (1-31/100)

3.73V

11110

Vref * (1-32/100)

3.67V

11111

Vref * (1-33/100)

3.62V