Hope RF
HP03 Series of calibrated sensor module
HP03S
2010-2-3
P= 23738 * 10 /2^5 + 2500 = 9918 = 991.8hpa
T= 250 + (-5478) * 3990 /2^16- (-5478/2^9) =-72 = -7.2°C
Version: 1.3
Serial Interface
The I
2
C interface is used for accessing calibration data as well as reading measurement
result from AD conversion.
The EEPROM and ADC is sharing the same I
2
C 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
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
EEPROM ADDRESS
(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.
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HOPERF [ Hope Microelectronics co., Ltd ]
