Pin Assignment

Pin Description

HT6P20D

Pin No.

Pin Name

I/O

Internal

Connection

Description

16

1~3

D0~D3

I

CMOS IN

Pull-high

Data input and transmission enable (active low)

They can be externally set to VSS or left open.

4

VSS

¾¾

Negative power supply, ground

5~8

NC

¾¾

No connection

9

OSC2

O

OSCILLATOR

Oscillator output pin

10

OSC1

I

OSCILLATOR

Oscillator input pin

11

DOUT

O

CMOS OUT

Data serial transmission output

12

VDD

¾¾

Positive power supply

13

VPP

I

¾

14

SIO

I/O

CMOS

IN/OUT

Programming address/control code input and mode code output for

mode verification

15

PGM

I

CMOS IN

Pull-high

Program mode control pin, active low

Approximate internal connection circuits

HT6P20X Series

Rev. 1.40

2

June 20, 2003

1

2

3

4

8

7

6

5

S I O

V P P

V D D

D O U T

P G M

V S S

O S C 2

O S C 1

2 4 - A d d r e s s

0 - D a t a

2 0 - A d d r e s s

4 - D a t a

1 6

1 5

1 4

1 3

1 2

1 1

1 0

9

1

2

3

4

5

6

7

8

D 0

P G M

S I O

V P P

V D D

D O U T

O S C 1

O S C 2

D 1

D 2

D 3

V S S

N C

N C

N C

N C

1

2

3

4

8

7

6

5

N C

V D D

D O U T

O S C 1

D 0

D 1

V S S

O S C 2

2 2 - A d d r e s s

2 - D a t a

H T 6 P 2 0 A

8 D I P / S O P

H T 6 P 2 0 B

8 D I P / S O P

H T 6 P 2 0 D

1 6 D I P / N S O P

C M O S I N / O U T

C M O S I N

P u l l - h i g h

O S C I L L A T O R

O S C 1

O S C 2

C M O S O U T