Application Circuits

*Note: The connection of IRQ and RD pin can be selected depending on the requirement of the mC.

Adjust R (external pull-high resistance) to fit user¢s time base clock.

HT1623

15

April 21, 2000

BZ

IR Q

H T 1623

DA T A

1 / 4 B i a s , 1 / 8 D u t y

CS

RD

WR

LC D P a ne l

C O M 0 ~ C O M 7

S E G 0 ~ S E G 4 7

BZ

Pi e z o

*

On - c hi p O S C

C l o ck O u t

E x t e r n al C l o c k 1 ( 32k H z )

E x t e r n al C l o c k 2 ( 32k H z )

m C

C r yst a l

3276 8H z

R*

OS C I

OS C O

VR

*

VD D

VL C D