APU428 Ver la hoja de datos (PDF) - APLUS INTEGRATED CIRCUITS

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APU428

4-Bit Micro-controller With LCD Driver

APLUS INTEGRATED CIRCUITS 

APU428

Pad No.

20

21

22

23

24

25

26

27

28

29

30

31

32

33

Pad Name

SEG20

SEG21

SEG22

SEG23

SEG24

SEG25

SEG26

SEG27

SEG28

SEG29

SEG30

SEG31

SEG32

SEG33

X

1970

1970

1970

1970

1970

1970

1970

1970

1970

1970

1970

1840

1710

1595

Y

995

1110

1225

1340

1455

1570

1685

1800

1915

2045

2175

2265

2265

2265

Pad No.

53

54

55

56

57

58

59

60

61

62

63

64

65

66

Pad Name

X

Y

INT

70

1340

IOM1

70

1225

IOM2

70

1110

IOM3

70

995

IOM4

70

880

VDD1

70

765

VDD2

70

650

VDD3

70

535

CUP1

70

420

CUP2

70

290

COM1

70

160

COM2

200

70

COM3

330

70

COM4

445

70

Chip size: 84.65 x 96.45 mil2

Pad Descriptions

Pad Name

I/O

BAK

VDD1

VDD2

VDD3

RESET

I

INT

I

TESTA

I

CUP1

O

CUP2

XIN

XOUT

I

O

CFIN

I

CFOUT

O

COM1~4

O

SEG1~42

O

IOA1~4

I/O

Description

Positive back-up voltage.

In Li mode, connects a 0.1u capacitance to GND.

LCD drives the voltage and positive supply voltage.

While in Ag mode, connects +1.5V to VDD1.

While in Li/ExtV mode, connects +3.0V to VDD2.

Input pin from LSI reset request signal.

Internal pull-down resistor.

Input pin for external INT request signal.

Falling or rising edge triggered by mask option.

Internal pull-down or pull-up resistor or none is selected by mask option.

Test signal input pin.

Switching pins for supplying the LCD driving voltage to the VDD1, 2, 3 pins.

Connects the CUP1 and CUP2 pins with nonpolarized electrolytic capacitor if

1/2 or 1/3 bias mode has been selected.

In the static mode, these pins should be open.

Time-based counter frequency (clock-specified, LCD alternating frequency,

alarm signal frequency) or system clock oscillation. 32kHz crystal oscillator.

Oscillation stops at the execution of STOP instruction.

System clock oscillation.

Connected with ceramic resonator.

Connected with RC oscillation circuit.

Oscillation stops at the execution of STOP or SLOW instruction.

Output pins for supplying voltage to drive the common pins of the LCD or LED

panel.

Output pins for LCD or LED panel segment.

Input/Output port A can use software to define the internal pull-low resistor and

chattering clock in order to reduce input bounce and generate interrupt.

This port shares pins with SEG37~40 and is set by mask option.

This port also shares pins with CC, RR, RT and RH, and is set by mask option.

Preliminary

4

Ver. 0.0

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