HP02S datasheet(4/6 Pages) ETC2

4 / 6 page

Hope RF

HP02S

BAROMETER MODULE

2011-6-8

Version: 1.4

Serial Interface

The I

2C interface is used for accessing calibration data as well as reading measurement

result from AD conversion.

Reading Calibration Factor:

The EEPROM chip address is set to 0, and reading or writing of the EEPROM is fully

compatible to AT24C02. Bus drive timing should be referred to the specification of this

part.

Coefficient

EEPROM ADDRESS(decimal)

Parameter Range(Hex)

D0(MSB:LSB)

(02:03)

0x0100 -- 0xFFFF

T0(MSB:LSB)

(04:05)

0x0100 -- 0xFFFF

P0(MSB:LSB)

(06:07)

0x0100 -- 0xFFFF

S(MSB:LSB)

(08:09)

0x0001 -- 0xFFFF

C(MSB:LSB)

(0A:0B)

0x0001 -- 0xFFFF

Reading Temperature and Pressure value:T1,D1

AD chip I

2C address is set to 0xEE (device write address), 0xEF (device read

address). In order to get the AD value D1 and T1, you have to follow the following

timing sequence:

Pressure Measure(D1):

S 11101110

A 11111111 A 11110000 A P D S 11101110 A 11111101 A S 11101111 A MSB A LSB NP

Select pressure measurement

Read AD value back

Temperature Measure(T1):

S 11101110

A 11111111 A 11101000 A P D S 11101110 A 11111101 A S 11101111 A MSB A LSB NP

Select temperature measurement

Read AD value back

S: I

2C bus START (refer to AT24C02 EEPROM start command)

P: I

2C bus STOP (refer to AT24C02 EEPROM stop command)

A (bold): I

2C bus acknowledge by slave (SDA pull low: slave send out bit 0)

A: I

2C bus acknowledge by master (SDA pull low: master send out bit 0)

N: I

2C bus no acknowledge from master (SDA keep high: master send out bit 1 instead)

D : delay for 38ms or above

MSB: conversion result (MSB bit clocked out first)

HP02S Datasheet(PDF) 4 Page - List of Unclassifed Manufacturers

HP02S Datasheet(HTML) 4 Page - List of Unclassifed Manufacturers

Html Pages

1 2 3 4 5 6

Datasheet Download

Link URL