HP02S Datasheet, PDF (5/6 Pages) List of Unclassifed Manufacturers – One hardware controlled reset line

Hope RF
BAROMETER MODULE
2011-6-8
LSB: conversion result (MSB bit clocked out first).
HP02S
Version: 1.4
Remark:
Before start an AD conversion cycle, remember to set XCLR pin high so that the system
is no longer in the reset state.
All data read from the module is in hex format.
After first power on, the first read data should be disregarded, and only the second value
be used. This can assure that unstable reading after power on reset can be filtered out.
For altitude calculation purpose, use averaging scheme to improve the stability of
pressure reading, we recommend making at least 8 times averaging so that it is possible to
achieve 0.3m accuracy (about 1 foot).
Typical Application Circuit Diagram:
Remark：
In the battery supply product this application need be changed as:
32 KHz signal is outputted via the port of the MCU instead of the 32.768 KHz crystal to
MCLK pin. The MCU will not output 32 KHz signal and keep low level when the
HP02S enter to standby mode.
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