EM78P568

8-bit OTP Micro-controller

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* This specification are subject to be changed without notice.

31

01/31/2004

V4.7

Bit 0 ~ Bit 7 (IOC90 ~ IOC97) : PORT9(0~7) I/O direction control register

0

put the relative I/O pin as output

1

put the relative I/O pin into high impedance

PAGE1 (PORT9 switches)

7

6

5

4

3

2

1

0

P97S

P96S

P95S

P94S

P93S

P92S

P91S

P90S

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

Bit 0(P90S) : Switch I/O PORT90 or LCD segment signal

0

(P90 pin is selected) : normal PORT90

1

(SEG20 pin) : SEGMENT output

Bit 1(P91S) : Switch I/O PORT91 or LCD segment signal

0

(P91 pin is selected) : normal PORT91

1

(SEG19 pin) : SEGMENT output

Bit 2(P92S) : Switch I/O PORT92 or LCD segment signal

0

(P92 pin is selected) : normal PORT92

1

(SEG18 pin) : SEGMENT output

Bit 3(P93S) : Switch I/O PORT93 or LCD segment signal

0

(P93 pin is selected) : normal PORT93

1

(SEG17 pin) : SEGMENT output

Bit 4(P94S) : Switch I/O PORT94 or LCD segment signal

0

(P94 pin is selected) : normal PORT94

1

(SEG16 pin) : SEGMENT output

Bit 5(P95S) : Switch I/O PORT95 or LCD segment signal

0

(P95 pin is selected) : normal PORT95

1

(SEG15 pin) : SEGMENT output

Bit 6(P96S) : Switch I/O PORT96 or LCD segment signal

0

(P96 pin is selected) : normal PORT96

1

(SEG14 pin) : SEGMENT output

Bit 7(P97S) : Switch I/O PORT97 or LCD segment signal

0

(P97 pin is selected) : normal PORT97

1

(SEG13 pin) : SEGMENT output

IOCA (TONE2 control, Control bits for DAC, DAC tone, Reference)

PAGE0 (TONE2 control register)

7

6

5

4

3

2

1

0

T27

T26

T25

T24

T23

T22

T21

T20

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

R/W-0

Bit 0 ~ Bit 7(T20 ~ T27) : Tone generator 2 ‘s frequency divider and power control

Please Run in Normal mode .

Clock source = 111957Hz

T27~T20 = ‘11111111’ => Tone generator2 will has 438Hz SIN wave output.

:

T27~T20 = ‘00000010’ => Tone generator2 will has 55921Hz SIN wave output.

T27~T20 = ‘00000001’ => DC bias voltage output

T27~T20 = ‘00000000’ => Power off

Built-in tone generators can generate dialing tone signals for telephone of dialing tone type or just a single

tone. In DTMF application, there are two kinds of tone. One is the group of row frequency (TONE1), the