HT1380A View Datasheet(PDF) - Holtek Semiconductor

Part Name

Description

MFG CO.

HT1380A

Step Counter

Holtek Semiconductor 

HT1380A/HT1381A

Timing Diagrams

Read Data Transfer

REST

S C LK

I/O

tC C

tC D H

tD C

0

7

C o m m a n d B y te

tC D D

0

O u tp u t D a ta B y te

tC D Z

7

Write Data Transfer

REST

S C LK

I/O

tC C

tC D H

tD C

0

tC L

7

C o m m a n d B y te

tC W H

tC H

tr

tC C H

tf

0

7

In p u t D a ta B y te

Application Circuit

V DD

M CU

In te r fa c e

C1 *

0 .1 m F

VDD

S C LK

X1

I/O

X2

REST

VSS

32768H z*

H T 1 3 8 0 A /H T 1 3 8 1 A

Note: * In order to obtain the correct frequency, it is recommended to use a crystal with a load capacitance of

9.0pF. It is not recommended to connect load capacitors to the X1 and X2 pins. If the power line is noisy, it

is recommended to add R1 and C1 for filtering out noise.

Rev. 1.00

9

June 15, 2012

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