Holtek Semiconductor HT1350
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 circuit, a step number/kilometer/mile/calorie step counter, a voltage doubler, and an LCD display multiplexer.FEATURES
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● Operating voltage: 1.5V Auto walking or jogging detection Step number/mileage/kilometer/calorie display LCD display
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● An oscillator with 32kHz Few external components Low power consumption An LCD with 1/3 duty, 1/2 bias
GENERAL DESCRIPTION
The IC can automatically distinguish walking from jogging, thus making appropriate calculations. Block Diagram V D D O S C 1 O S C 2 V S S O s c illa to r T E S T 1 T E S T 2 T E S T 3 R E S E T P r e s c a le r S T E P 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 K m 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 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 O D E M o d e S w itc h L e v e l S h ift C ir c u it C P 1 C P 2 C P 3 C O M 1 C O M 2 C O M 3 O U T 4 O U T 1 7 1 June 28, 1999 HT1350 Pad Assignment A U T O /M A N U W A L K /R U N R E S E T T E S T 3 M O D E V D D V S S T E S T 2 1 2 3 T E S T 1 O S C 2 3 2 3 1 3 0 2 9 2 8 2 7 2 6 2 5 2 4...