Block Diagram

Pin Assignment

HT1660

Rev. 1.30

2

April 13, 2006

W a t c h d o g T i m e r

&

T i m e B a s e G e n e r a t o r

D i s p l a y R A M

L C D D r i v e r /

B i a s C i r c u i t

C o n t r o l

&

T i m i n g

C i r c u i t

W R

O S C I

C S

R D

C O M 0

C O M 3 1

S E G 0

S E G 9 5

T o n e F r e q u e n c y

G e n e r a t o r

B Z

B Z

I R Q

V S S

V D D

V L C D

O S C O

D B 0

D B 3

N o t e : C S : C h i p s e l e c t i o n

B Z , B Z : T o n e o u t p u t s

W R , R D : W R I T E c l o c k , R E A D c l o c k

D B 0 ~ D B 3 : D a t a b u s

C O M 0 ~ C O M 3 1 , S E G 0 ~ S E G 9 5 : L C D o u t p u t s

I R Q : T i m e b a s e o r W D T o v e r f l o w o u t p u t

H T 1 6 6 0

2 0 8 Q F P - A

1 5 6

1 5 5

1 5 4

1 5 3

1 5 2

1 5 1

1 5 0

1 4 9

1 4 8

1 4 7

1 4 6

1 4 5

1 4 4

1 4 3

1 4 2

1 4 1

1 4 0

1 3 9

1 3 8

1 3 7

1 3 6

1 3 5

1 3 4

1 3 3

1 3 2

1 3 1

1 3 0

1 2 9

1 2 8

1 2 7

1 2 6

1 2 5

1 2 4

1 2 3

1 2 2

1 2 1

1 2 0

1 1 9

1 1 8

1 1 7

1 1 6

1 1 5

1 1 4

1 1 3

1 1 2

1 1 1

1 1 0

1 0 9

1 0 8

1 0 7

1 0 6

1 0 5

2 0 8

1

2

3

4

5

6

7

8

9

1 0

1 1

1 2

1 3

1 4

1 5

1 6

1 7

1 8

1 9

2 0

2 1

2 2

2 3

2 4

2 5

2 6

2 7

2 8

2 9

3 0

3 1

3 2

3 3

3 4

3 5

3 6

3 7

3 8

3 9

4 0

4 1

4 2

4 3

4 4

4 5

4 6

4 7

4 8

4 9

5 0

5 1

5 2

5 3

2 0 7 2 0 6 2 0 5 2 0 4 2 0 3 2 0 2 2 0 1 2 0 0 1 9 9 1 9 8 1 9 7 1 9 6 1 9 5 1 9 4 1 9 3 1 9 2 1 9 1 1 9 0 1 8 9 1 8 8 1 8 7 1 8 6 1 8 5 1 8 4 1 8 3 1 8 2 1 8 1 1 8 0 1 7 9 1 7 8 1 7 7 1 7 6 1 7 5 1 7 4 1 7 3 1 7 2 1 7 1 1 7 0 1 6 9 1 6 8 1 6 7 1 6 6 1 6 5 1 6 4 1 6 3 1 6 2 1 6 1 1 6 0 1 5 9 1 5 8 1 5 7

C O M 2 2

C O M 2 1

C O M 2 0

C O M 1 9

C O M 1 8

C O M 1 7

C O M 1 6

N C

N C

N C

N C

N C

N C

N C

N C

N C

C S

R D

W R

D B 0

D B 1

D B 2

D B 3

V S S

O S C I

O S C O

V D D

V L C D

I R Q

B Z

B Z

T 1

T 2

T 3

T 4

T 0 0 0

V L C D

N C

N C

N C

N C

N C

N C

N C

N C

C O M 0

C O M 1

C O M 2

C O M 3

C O M 4

C O M 5

C O M 6

S E G 6 8

S E G 6 7

S E G 6 6

S E G 6 5

S E G 6 4

S E G 6 3

S E G 6 2

S E G 6 1

S E G 6 0

S E G 5 9

S E G 5 8

S E G 5 7

S E G 5 6

S E G 5 5

S E G 5 4

S E G 5 3

S E G 5 2

S E G 5 1

S E G 5 0

S E G 4 9

S E G 4 8

N C

N C

N C

N C

N C

N C

N C

N C

N C

N C

S E G 4 7

S E G 4 6

S E G 4 5

S E G 4 4

S E G 4 3

S E G 4 2

S E G 4 1

S E G 4 0

S E G 3 9

S E G 3 8

S E G 3 7

S E G 3 6

S E G 3 5

S E G 3 4

S E G 3 3

S E G 3 2

S E G 3 1

S E G 3 0

S E G 2 9

S E G 2 8

S E G 2 7