HT1350 Datasheet, PDF (1/6 Pages) Holtek Semiconductor Inc – Step Counter

HT1350
Step Counter
Features
· Operating voltage: 1.5V
· Auto walking or jogging detection
· Step number/mileage/kilometer/calorie
display
· LCD display
General Description
The HT1350 is a step counter IC implemented
in the CMOS technology. It provides an LCD
with a whole course (kilometer/mile) as well as
the consumed calorie display.
The HT1350 consists of internal oscillator cir-
cuit, a step number/kilometer/mile/calorie step
· An oscillator with 32kHz
· Few external components
· Low power consumption
· An LCD with 1/3 duty, 1/2 bias
counter, a voltage doubler, and an LCD display
multiplexer.
The IC can automatically distinguish walking
from jogging, thus making appropriate calcula-
tions.
Block Diagram
VDD VSS
O SC1
O SC2
O s c illa to r
P r e s c a le r
TEST1
TEST2
TEST3
RESET
STEP
S te p P u ls e
G e n e ra to r
S te p
C o u n te r
M ile
C o u n te r
Km
C o u n te r
C a le s
C o u n te r
W A L K /R U N
A U T O /M A N U
M ODE
A u to -D e te c t
C ir c u it
( J o g /W a lk )
M u ltip le x e r C ir c u it
M ode
S w itc h
L e v e l S h ift
C ir c u it
C P1 C P2 C P3 C O M 1 C O M 2 C O M 3 O U T4
O U T17
1
June 28, 1999