Pin Assignment

Note: The customer code and control code have been programmed into HT6P20A/B/D by Holtek¢s

factory process.

The blank device HT6P20 is not programmed, it can be programmed by Holtek¢s programming

kit.

Warning: The 8-pin blank device only allows programming as HT6P20A type.

The 16-pin blank device allows programming as one of HT6P20/D type. After program-

ming the HT6P20 pin name are the same as one of HT6P20D, which is determined by the

kit programming procedure.

Pin name ²NC² stands for no connection (floating).

HT6P20

2

May 2, 2000

1

2

3

4

8

7

6

5

SI O

VPP

VD D

DO U T

PG M

VSS

OS C 2

OS C 1

24- A d d r ess

0 - D a t a

2 0 - A ddr e s s

4 - D a t a

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

D0

PG M

SI O

VPP

VD D

DO U T

OS C 1

OS C 2

D1

D2

D3

VS S

NC

NC

NC

NC

1

2

3

4

8

7

6

5

NC

VD D

DO U T

OS C 1

D0

D1

VSS

OS C 2

22- A d d r ess

2 - D a t a

B l an k d e vi ce

B l an k d e vi ce

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

D0

PG M

SI O

VPP

VD D

DO U T

OS C 1

OS C 2

D1

D2 / N C

D3 / N C

VS S

D4 / N C

D5 / N C

D6 / N C

D7 / N C

H T 6P 20A

8 D IP /N S O P

HT 6 P 2 0 B

8 D IP /N S O P

HT 6 P 2 0 D

1 6 D I P / N S O P

HT 6 P 2 0

1 6 D I P / N S O P

1

2

3

4

8

7

6

5

SI O

VPP

VD D

DO U T

PG M

VSS

OS C 2

OS C 1

HT 6 P 2 0

8 D IP /N S O P