HP03M Datasheet, PDF (5/7 Pages) List of Unclassifed Manufacturers – HP03M

Hope RF
2010-2-3
Serial Interface
HP03 Series of calibrated sensor module
HP03M
Version: 1.3
The I²C interface is used for accessing calibration data as well as reading measurement
result from AD conversion.
The EEPROM and ADC is sharing the same I²C bus but with different chip address
assigned. The EEPROM chip address is set to 0xA1(in the case of read), write operation
is not allowed. For AD part, the chip address is set to 0xEE. So this module used two
different addresses for calibration data and AD converting data accessing. Calibration
EEPROM data read operation is fully compatible to 24C02. Bus drive timing should be
referred to the specification of this part as well.
Coefficient
EEPROM ADDRESS
C1(MSB:LSB)
C2(MSB:LSB)
C3(MSB:LSB)
C4(MSB:LSB)
C5(MSB:LSB)
C6(MSB:LSB)
C7(MSB:LSB)
A
B
C
D
(16:17)
(18:19)
(20:21)
(22:23)
(24:25)
(26:27)
(28:29)
(30)
(31)
(32)
(33)
AD chip address is set to 0xEE(device write address), 0xEF(device read address). In
order to get the AD value D1 and D2, you have to follow the following timing
sequence:
Pressure Measure:
S 11101110 A 11111111 A 11110000 A P D S 11101110 A 11111101 A S 11101111 A MSB A LSB N P
Temperature Measure:
S 11101110 A 11111111 A 11101000 A P D S 11101110 A 11111101 A S 11101111 A MSB A LSB N P
S: start condition
P: stop condition
A ( bold) : acknowledge from slave
A : acknowledge from master
N: no acknowledge from master (send out bit 1 instead)
D : delay for 40ms minimum
MSB: conversion result MSB
LSB: conversion result LSB.
Remark:
Before start an AD conversion cycle, remember to pull high for XCLR pin 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
should be used. This can assure that any unstable data after reset can be filtered out.
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