Page 1
DataSheet HP206C
PRECISION BAROMETER AND ALTIMETER SENSOR
Features
Supply voltage: 1.8V to 3.6V
Pressure range: 300mbar~1200mbar
Programmable events and interrupt controls
Fully data compensated
Direct Reading, compensated：
– Pressure: 20-bit measurement (Pascals)
– Altitude: 20-bit measurement (Meters)
– Temperature: 20-bit measurement (Degrees Celsius)
Altitude Resolution down to 0.1 meter
Standby current<0.1μA
Operation temperature: -40 to +85℃
High-speed I²C digital output interface
Size: 6.8 x 6.2 x 3.0(+0.2) mm
Applications
High Precision Mobile Altimeter / Barometer
Industrial Pressure and Temperature Sensor System
Automotive Systems
Personal Electronics Altimetry
Adventure and Sports watches
Medical Gas Control System
Weather Station Equipment
Indoor Navigation and Map Assist
Heating, Ventilation, Air Conditioning
6.8×6.2×3.0(+0.2)mm
Descriptions
The HP206C employs a MEMS pressure sensor with an I²C interface to provide accurate temperature,
pressure or altitude data. The sensor pressure and temperature outputs are digitized by a high resolution
24-bit ADC. The altitude value is calculated by a specific patented algorithm according to the pressure and
temperature data. Data compensation is integrated internally to save the effort of the external host MCU
system. Easy command-based data acquisition interface and programmable interrupt control is available.
Typical active supply current is 5.3μA per measurement-second while the ADC output is filtered and
decimated by 256. Pressure output can be resolved with output in fractions of a Pascal, and altitude can be
resolved in 0.1 meter. Package is surface mount with a stainless steel cap and is RoHS compliant.
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DataSheet HP206C
1. Block Diagram
VDD
Sensor
PGA
OSC LDO
24-bit
ADC
Digital
Filter
Temperature
Sensor
128-Byte
NVM
Trim values
Full
Compensation
Altitude
Computation
Resetn
Compensated
data
Altitude data
Filtered data
POR
12C
Interface
+
Interrupt
Controls
SCL
SDA
INT1
GND
Figure 1: Functional block diagram
2. Mechanical and Electrical Specifications
2.1 Pressure and Temperature Characteristics
Table1: Pressure Output Characteristics @ VDD = 3.0V, T = 25°C unless otherwise noted
Parameter Symbol Conditions Min Typ. Max Unit
Pressure Measurement
Range
300 1200 mbar
P
FS
700 to 1100 mbar from 0 to 50℃℃ -1.5 +1.5 mbar
Pressure Absolute
Accuracy
700 to 1100 mbar from -20 to 70℃℃-3 +3 mbar
Pressure Relative
Accuracy
700 to 1100 mbar at 25℃ ±0.5
mbar
700 to 1100 mbar From 0 to 50℃℃ ±1.5
Max Error with Power
Supply
Pressure/Altitude
Resolution
Power supply from 1.8V to 3.6V -2.5 +2.5 mbar
Pressure Mode 0.01 mbar
Altimeter Mode 0.10 m
Board Mount Drift After solder reflow ±0.5 mbar
Long Term Drift After a period of 1 year ±1.5 mbar
Reflow soldering impact IPC/JEDEC J-STD-020C +0.5 mbar
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A
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DataSheet HP206C
Table2: Temperature Output Characteristics @ VDD = 3.0V, T = 25°C unless otherwise noted
Parameter Symbol Conditions Min Typ Max Unit
Operation Temperature
Range
Temperature Absolute
Accuracy
Max Error with Power
Temperature Resolution of
Output Data
T
-40 85 ℃
OP
25℃ ±0.3 ±0.5
-10 to +70℃℃ ±0.6 ±1.0
-40 to + 85℃℃ ±1.0 ±1.5
Power supply from 1.8V to 3.6V ±0.5 ℃
0.01 ℃
℃
℃
℃
2.2 Electrical Characteristics
Table3: DC Characteristics @VDD=3.0 V, T=25 unless otherwise note℃
Parameter Symbol Conditions Min Typ. Max Unit
Operation Supply Voltage VDD 1.8 3.0 3.6 V
Operation Temperature TOP -40 85 ℃
4096
verage Operation Current
(Pressure Measurement
under One Conversion per
Second)
I
DDAVP
OSR*
2048
1024
512
256
128
4096
verage Operation Current
(Temperature
Measurement under One
Conversion per Second)
OSR*
I
DDAVT
2048
1024
512
256
128
4096
2048
Conversion Time of
Pressure or Temperature
t
OSR*
CONV
1024
512
256
128
Peak Current I
Standby Supply Current I
Serial Data Clock
Frequency
During conversion 1.3
PEAK
At 25℃ 0.1 μA
DDSTB
f
SCLK
protocol, pull-up resistor of 10
I2C
100 400 kHz
Digital Input High Voltage VIH 0.8 V
Digital Input Low Voltage VIL 0.2 V
Digital Output High
Volta
e
Digital Output Low
Voltage
Input Capacitance CIN 4.7 pF
*OSR stands for over sampling rate
V
IO = 0.5 mA 0.9 V
OH
V
IO = 0.5 mA 0.1 V
OL
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85.2
42.6
21.3
10.7
5.3
2.7
68.8
34.4
17.2
8.6
4.3
2.2
65.6
32.8
16.4
8.2
4.1
2.1
μA
μA
ms
mA
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DataSheet HP206C
2.3 Absolute Maximum Rating
Table 4
Parameter Symbol Conditions Min Max Unit
Overpressure
Supply Voltage
Interface Voltage
Storage Temperature
Range
Maximum Soldering
Temperature
ESD Rating
Latch-up Current
Stresses above those listed as “absolute maximum ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the device under these conditions is not implied.
Exposure to maximum rating conditions for extended periods may affect device reliability.
P
MAX
V
DD
V
IF
T
STG
T
40 second maximum 250 ℃
MS
Human body model -2 +2 kV
At 85℃ -100 100 mA
2 bar
-0.3 3.6 V
-0.3 VDD+0.3 V
-50 150 ℃
3. Function Descriptions
3.1 General Description
The HP206C is a high precision barometer and altimeter that measures the pressure and the temperature
by an internal 24-bit ADC and compensates them by a patented algorithm. The fully-compensated values
can be read out via the I²C interface by external MCU. The uncompensated values can also be read out in
case the user wants to perform their own data compensation. The devices can also compute the value of
altitude according to the measured pressure and temperature.
Furthermore, the device allows the user to setup the temperature, pressure and altitude threshold values
for various events. Once the device detects that a certain event has happened, a corresponding interrupt
will be generated and sent to the external MCU. Also, multiple useful interrupt options are available to be
used by the user.
3.2 Factory Calibration
Every device is individually factory calibrated for sensitivity and offset for both of the temperature and
pressure measurements. The trim values are stored in the on-chip 128-Byte Non-Volatile Memory (NVM).
In normal situation, further calibrations are not necessary to be done by the user.
3.3 Automatic power on initialization
Once the device detects a valid VDD is externally supplied, an internal Power-On-Reset (POR) is
generated and the device will automatically enter the power-up initialization sequence. After that the device
will enter the sleep state. Normally the entire power-up sequence consumes about 400 us.
The user can scan a DEV_RDY bit in the INT_SRC register in order to know whether the device has
finished its power-up sequence. This bit appears to 1 when the sequence is done. The device stays in the
sleep state unless it receives a proper command from the external MCU. This will help to achieve minimum
power consumptions.
3.4 Sensor Output Conversion
For each pressure measurement, the temperature is always being measured prior to pressure
measurement automatically, while the temperature measurement can be done individually. The conversion
results are stored into the embedded memories that retain their contents when the device is in the sleep
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DataSheet HP206C
state.
The conversion time depends on the value of the OSR parameter sent to the device within the ADC_CVT
command. Six options of the OSR can be chosen, range from 128, 256 … to 4096. The below table shows
the conversion time according to the different values of OSR:
Table 5: Conversion Time VS OSR
OSR
128
256
512
1024
2048
4096
Temperature Temperature and
Conversion Time (ms)
2.
1
4.
1
8.
2
16.
4
32.
8
65.
6
Pressure (or Altitude)
4.
1
8.
2
16.
4
32.
8
65.
6
131.
1
The higher OSR will normally achieve higher measuring precision, but consume more time and power.
The conversion results can be compensated or uncompensated. The user can enable/disable the
compensation by setting the PARA register before performing the conversions.
3.5 Altitude Computation
The device can compute the altitude according to the measured pressure and temperature. The altitude
value is updated and available to read as soon as the temperature and pressure measurement is done.
4. Access Modes & Commands
4 .1 Operation Flow
During each power-up/reset cycle, the device will only perform one calibration. After that it will enter the
SLEEP state waiting for any incoming commands. It will take actions after receiving different proper
commands, and re-enters the SLEEP state when it finishes the jobs.
CALIBRATION
SoftReset
Commandor
ResetfromPin
OtherCommands
SLEEP ACTIONS
Done
4.2 Command
The Command Set (Table 6) allows the user to control the device to perform the measuring, results
reading and the miscellaneous normal operations.
4.2.1 Soft Reset the Device
.SOFT_RST (0x06)
Once the user issues this command, the device will immediately be reset no matter what it is working on.
POR
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DataSheet HP206C
Once the command is received and executed, all the memories (except the NVM) will be reset to their
default values following by a complete power-up sequence to be automatically performed.
4. 2.2 OSR and Channel Setting
.ADC_CVT (010, 3-bit OSR, 2-bit CHNL)
This command let the device to convert the
depends on the PARA register setting. The 2-bit channel (CHNL) parameter tells the device the data from
which channel(s) shall be converted by the internal ADC. The options are shown below:
00: sensor pressure and temperature channel
10: temperature channel
The 3-bit OSR defines the decimation rate of the internal digital filter as shown below:
000: OSR = 4096 011: OSR = 512
001: OSR = 2048 100: OSR = 256
010: OSR = 1024 101: OSR = 128
Setting the CHNL bits to the value of 01 or 11, or the OSR bits to the values of 110 or 111 will lead to
failure of conversion.
4 . 2.3 Read the Temperature and Pressure Values
sensor output
to the digital values with or
without compensation
READ_PT (0x10)
The temperature data is arranged as 20-bit 2’s complement format and the unit is in degrees
C.Temperature value is stored in all 24 bits of OUT_T_MSB, OUT_T_CSB and OUT_T_LSB. The 4
most significant bits of the 24-bit data is useless, while the 20 least significant bits represent the
temperature value. The user shall convert this 20-bit 2’s complement binary value into an integer, and
then divide the integer by 100 to obtain the final result.
The pressure data is arranged as 20-bit 2’s complement format and the unit is in Pascal. Pressure
value is stored in all 24 bits of OUT_T_MSB, OUT_T_CSB and OUT_T_LSB. The 4 most significant
bits of the 24-bit data is useless, while the 20 least significant bits represent the pressure value. The
user shall convert this 20-bit unsigned binary value into an integer, and then divide the integer by 100
to obtain the final result.
For Example : (Temperature)
Hex value OUT_T_MSB OUT_T_CSB OUT_T_LSB Dec value
0x000A5C 0x00 0x0A 0x5C 26.52
0xFFFC02 0xFF 0xFC 0x02 -10.22
ForExample : (Unsigned data pressure)
Hex value OUT_ P _MSB OUT_ P_CSB OUT_ P_LSB Dec value
0x018A9E 0x01 0x8A 0x9E 1010.22
4. 2.4 Read the Temperature and Altitude Values
.READ_AT (0x11)
The temperature data is arranged as 20-bit 2’s complement format and the unit is in degrees
C.Temperature value is stored in all 24 bits of OUT_T_MSB, OUT_T_CSB and OUT_T_LSB. The 4
most significant bits of the 24-bit data is useless, while the 20 least significant bits represent the
temperature value. The user shall convert this 20-bit 2’s complement binary value into an integer, and
then divide the integer by 100 to obtain the final result.
altitude data is arranged as 20-bit 2’s complement format and the unit is in meters. Altitude value is
The
stored in all 24 bits of OUT_T_MSB, OUT_T_CSB and OUT_T_LSB. The 4 most significant bits of the
24-bit data is useless, while the 20 least significant bits represent the
convert this 20-bit unsigned binary value into an integer, and then divide the integer by 100 to obtain
the final result.
altitude value. The user shall
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DataSheet HP206C
For Example : (Altitude)
Hex value
0x001388 0x00 0x13 0x88 50.00
0xFFEC78 0xFF 0xEC 0x78 -50.00
OUT_A_MSB OUT_A_CSB OUT_A_LSB Dec value
4. 2.5 Read the Pressure Value
.READ_P (0x30)
The pressure data is arranged as 20-bit 2’s complement format and the unit is in Pascal. Pressure
value is stored in all 24 bits of OUT_T_MSB, OUT_T_CSB and OUT_T_LSB. The 4 most
significant bits of the 24-bit data is useless, while the 20 least significant bits represent the
pressure value. The user shall convert this 20-bit unsigned binary value into an integer, and then
divide the integer by 100 to obtain the final result.
4. 2.6 Read the Altitude Value
.READ_A (0x31)
The altitude data is arranged as 20-bit 2’s complement format and the unit is in meters. Altitude
value is stored in all 24 bits of OUT_T_MSB, OUT_T_CSB and OUT_T_LSB. The 4 most
significant bits of the 24-bit data is useless, while the 20 least significant bits represent the
value. The user shall convert this 20-bit unsigned binary value into an integer, and then divide the
integer by 100 to obtain the final result.
altitude
4. 2.7 Read the Temperature Value
.READ_T (0x32)
The temperature data is arranged as 20-bit 2’s complement format and the unit is in degrees
C.Temperature value is stored in all 24 bits of OUT_T_MSB, OUT_T_CSB and OUT_T_LSB. The 4
most significant bits of the 24-bit data is useless, while the 20 least significant bits represent the
temperature value. The user shall convert this 20-bit 2’s complement binary value into an integer, and
then divide the integer by 100 to obtain the final result.
4. 2.8 Re-calibrate the Internal analog Blocks
.ANA_CAL (0x28)
This command allows the user to re-calibrate the internal circuitries in a shorter time compare to soft
resetting the device. It is designed for the applications where the device needs to work in a rapidly changed
environment. In those environments, since the temperature and supply voltage may have changed
significantly since the first power-up sequence during which the calibrations have been performed, the
circuitries may not adept to the world as better as they were just calibrated. Therefore, in this case,
re-calibrating the circuitries before performing any sensor conversions can give a more accurate result.
Once the device received this command, it calibrates all the circuitries and enters the sleep state when it
finishes. The user can simply send this command to the device before sending the ADC_CVT
However,
it is not necessary to use this command when the environment is stable.
command.
4. 2.9 Read the Control Registers
.READ_REG (0x80+ register address)
This command allows the user to read out the control registers.
4. 2.10 Write the Control Registers
.WRITE_REG (0xc0 + register address)
This command allows the user to write in the control register
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DataSheet HP206C
Table6: The Command Set
Name Hex Code Binary Code Descriptions
SOFT_RST 0x06 0000 0110 Soft reset the device
ADC_CVT NA 010_OSR_chnl Perform ADC conversion
READ_PT 0x10 0001 0000
READ_AT 0x11 0001 0001 Read the temperature and altitude values
READ_P 0x30 0011 0000 Read the pressure value only
READ_A 0x31 0011 0001 Read the altitude value only
READ_T 0x32 0011 0010 Read the temperature value only
ANA_CAL 0x28 0010 1000 Re-calibrate the internal analog blocks
READ_REG NA 10_addr Read out the control registers
WRITE_REG NA 11_addr Write in the control registers
Read the temperature and pressure
values
5. I²C Interface
The I²C interface is fully compatible to the official I²C protocol specification. All the data are sent starting
from the MSB. Successful communication between the host and the device via the I²C bus can be done
using the four types of protocol introduced below.
5.1 I²C Specification
Table7: I²C Slave Timing Values
Parameter Symbol
SCL Clock Frequency
Bus free time between STOP and START
condition
Repeated START Hold Time
Repeated START Setup Time
STOP Condition Setup Time
SDA Data Hold Time
SDA Setup Time
SCL Clock Low Time
SCL Clock High Time t
SDA and SCL Rise Time tR
SDA and SCL Fall Time tF
SCL Pull-up = 10 kΩ
t
BUF
t
HD.STA
t
SU.STA
t
SU.STO
t
HD.DAT
t
SU.DAT
t
LOW
HIGH
Condition Min Typ. Max
I²C
0
1.5
0.6
0.6
0.6
100 ns
100 ns
1.5
0.6 µs
30 500 ns
30 500 ns
400
Unit
KHz
µs
µs
µs
µs
µs
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DataSheet HP206C
5.2 I²C Device and Register Address
The
I²C
device address is shown below.
and 0XED (read).
A7 A6 A5 A4 A3 A2 A1 W/R
1 1 1 0 1 1
The LSB of the device address is
0
0/1
corresponding to address 0XEC (write)
5.3 I²C Protocol
The 1st TYPE: the host issuing a single byte command to the device
The host shall issue the Device Address (ID) followed by a Write Bit before sending a Command byte. The
device will reply an ACK after it received a correct SOFT_RST command.
1 1 1 0 1 1 0 0
S
Device Address
W A
0 0 0 0 0 1 1 0
0
Command
The 2nd TYPE: the host writing a register inside the device
The host shall issue the Device Address (ID) followed by a Write Bit before sending a command byte and a
data byte. This format only applies while the user wants to send the WRITE_REG command.
1 1 1 0 1 1
S
Device
Address
0
0
W A
1 1 0 0 1 0 1 0
0
Command
0 0 0 0 0 1 1 0
0
A
Data
The 3rd TYPE: the host reading a register from the device
In this activity there are two frames that are sent separately. The first frame is to send the READ_REG
command which contains a 2-bit binary number of 10 followed by a 6-bit register address. The format of
the first frame is identical to the 1
st
type activity. In the second frame, the device will send back the
register data after receiving the correct device address followed by a read bit. This format only applies
while the user wants to use the READ_REG command.
1 1 1 0 1 1
S
Device
0
Address W
0
0
1 0 0 0 0 1 1 0
A
Command
A
0
P
1 1 1 0 1 1
0
0 1 0 0 1 0 1 1 0
1
1
0
P
A
0
P
A
S
Device
Address
A Data
R
N P
The 4th TYPE: the host reading the 3-byte or 6-byte ADC data from the device
In this activity there are two frames that are sent separately. The first frame is identical to sending a
single command, which can be one of the conversion result reading commands. In the second frame,
the device will send back the ADC data (either 3 bytes or 6 bytes depending on the commands) after
receiving the
1 1 1 0 1 1
S Device Address W
0
0
0
00000110
A
Command
0
A
P
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DataSheet HP206C
1 1 1 0 1 1
S
Device
Address R
Bit Descriptions
FromHost
S
StartBit P
W Write
A
ACK
R
N
0
FromChip
StopBit
Read
NACK
0
1
A
0 1 0 0
0 1 1 0
Data Byte 6 or
0
3
A
0 0 1 1 0 1 0 0
Data Byte 0
1
N P
6. Control Registers
The control registers allow the user to set the threshold values for various event detections, configure the
interrupt setting, and enable/disable the data compensation. It is recommended for the user to set these
registers to the desired values before performing the conversions or any other command-based operations.
The following is a table of all the control registers.he registers from 0x00 to 0x0A are designed for the user to
setup the parameters (offset and thresholds) for pressure (or altitude) and temperature event detections. The
registers from 0x0B to 0x0D are used for interrupt controls. The register of 0x0E is dedicated for switching
on/off the sensor output compensation function inside the device.
Table 8: Control Registers List
Addr Name Default Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
ALT_OFF_LS
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08 T_H_TH 0x00 T_H_TH [7:0]
B
ALT_OFF_MS
B
PA_H_ TH_ LS
B
PA_H_ TH_ MS
B
PA_M_ TH_ LS
B
PA_M_ TH_ MS
B
PA_L_TH_LS
B
PA_L_TH_MS
B
0x00 ALT_OFF [7:0]
0x00 ALT_OFF [15:8]
0x00 PA_H_TH [7:0]
0x00 PA_H_TH [15:8]
0x00 PA_M_TH [7:0]
0x00 PA_M_TH [15:8]
0x00 PA_L_TH [7:0]
0x00 PA_L_TH [15:8]
0x09 T_M_TH 0x00 T_M_TH [7:0]
0x0A T_L_TH 0x00 T_L_TH [7:0]
0x0B INT_EN 0x00 Reserved Reserved
0x0C INT_CFG 0x00 Reserved PA_MODE
0x0D INT_SRC 0x00 TH_ERR DEV_RDY PA_RDY T_RDY PA_TRAV T_TRAV PA_WIN T_WIN
0x0E INT_DIR 0x00
0X0F PARA 0X80
CMPS_E
N
CMPS_E
N
Reserved Reserved Reserved P_TRAV_DIR T_TRAV_DIR P_WIN_DIR T_WIN_DIR
Reserved Reserved Reserved Reserved Reserved Reserved Reserved
PA_RDY_E
N
PA_RDY_CF
G
T_RDY_EN PA_TRAV_EN T_TRAV_EN PA_WIN_EN T_WIN_EN
T_RDY_CFG PA_TRAV_CFG T_TRAV_CFG PA_WIN_CFG T_WIN_CFG
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DataSheet HP206C
6.1 Setup the Altitude Offset Compensation Parameter
6.1.1 ALT_OFF_LSB, ALT_OFF_MSB - (RW)
The two registers form the 16-bit value of ALT_OFF, which saves the altitude offset data used to
compensate the altitude calculation. The data is in 2’s complement format and the unit is in centimeter. The
users need to set these registers if they need to use the altitude computation function of the device.
(P
)
Normally, the values of the local average standard atmospheric pressure
around the world. The varying range is from 1000 mbar to 1026 mbar. The device requires the user to setup
the ALT_OFF to remove the offset. The following table is provided to assist to finding the value of desired
altitude offset.
has unit in mbar, Aoffset has unit in meter
P
local
P
local
A
o
set
1000
1001
1002
1003
‐111.18 ‐102.73 ‐94.29 ‐85.85
P
local
A
o
set
1004
‐77.43
1005
1006
1007
‐69.02
‐60.62 ‐52.23
P
local
A
o
set
1008
‐43.84
1009
1010
1011
‐35.47
‐27.11 ‐18.76
P
local
A
o
set
1012
‐10.41
1013
1014
1015
‐2.08
6.24
14.56
P
local
A
o
set
1016
22.86
1017
1018
1019
31.15
39.44
47.71
P
local
A
o
set
1020
55.98
1021
1022
1023
64.23
72.48
80.71
P
local
A
o
set
1024
88.94
1025
1026
97.16
105.36
P
If the users find out that the value of
offset value in the above table; if the
smaller than P2 (P1
corresponding altitude
and P2 are two adjacent pressure values in the table),
offset value A1 and A2 in the table, than use either of the following two formulas
is an integer, they can directly obtain the corresponding altitude
local
P
has decimal numbers and the value is larger than P1 and
local
to calculate the desired altitude offset value A:
A = A
A = A1 + 8.326 x (P
– P1), or
local
- 8.326 x (P2 – P
2
For example, the P
is 22.86 m and A2 is 31.15 m. Thus:
A
1
is 1016.4 mbar, which is between
local
A = 22.86 + 8.326 x (1016.4 – 1016) = 26.19 m, or A = 31.15 - 8.326 x (1017 – 1016.4) = 26.15 m
Either of the results is acceptable. After obtaining the value of A, no matter by looking up the table
directly or by calculation, the user shall multiply the A by 100 in order to convert the unit from meter to
centimeter.
Finally, convert the result to a 2’s complement number to obtain ALT_OFF, and fill it into the two registers.
The following table shows 2 examples with the calculated altitude offsets and their corresponding values
to fill into the two registers.
)
local
1016 mbar (P
) and 1017 mbar (P2). Looking up the table,
1
may vary in different places
local
the user shall first obtain the
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DataSheet HP206C
For Example:
O
ffset
50.02
-100.05
Hex Value
m
0x1
m 0XD8EB
38A
ALT_OFF_MS
0x1
0xD
3
8
B ALT_OFF_LSB
0x8A
0xEB
6.2 Setup the Events Detection Parameters
6.2.1 PA_H_TH_LSB, PA_H_TH_MSB - (RW)
The two registers form the 16-bit value of PA_H_TH which saves the pressure (or altitude) upper bound
threshold for event detection. When the PA_MODE bit in the INT_CFG register is set to 0, the contents
stored in these registers are the pressure thresholds. Its value should be a 16-bit unsigned number and its
unit is in 0.02 mbar. When setting the pressure thresholds, the user must divide the actual thresholds by
0.02, and then convert the result to a 2’s complement number.
When the
contents stored in these registers are the altitude thresholds. Its value should be a 16-bit 2’s complement
number and its unit is in meter.
For Example:
PA_MODE = 0 (pressure, unit in 0.02 mbar)
Threshol
800.06 mbar 0x9
900 mbar
PA_MODE = 1 (altitude, unit in meter)
Threshol
d Hex Value PA_H_TH_MS
C43
0xAFC8
d Hex Value PA_H_TH_MS
5000
m
0x1
388
0x9
0xA
0x1
C
F
3
B PA_H_TH
B PA_H_TH
_LS
B
0x4
3
0xC
8
_LS
B
0x8
8
These examples are also applied to setting the pressure (or altitude) middle and lower bound threshold
registers as introduced below.
6.2.2 PA_M_TH_LSB, PA_M_TH_MSB - (RW)
The two registers form the 16-bit value of PA_M_TH which saves the pressure (or altitude) middle threshold
for event detection. Similar to the PA_H_TH, the meaning of their values and the data formats are selected
by the PA_MODE bit.
6.2.3 PA_L_TH_LSB, PA_L_TH_MSB - (RW)
The two registers form the 16-bit value of PA_L_TH which saves the pressure (or altitude) lower bound
threshold for event detection. Similar to the PA_H_TH, the meaning of their values and the data formats are
selected by the PA_MODE bit.
6.2.4 T_H_TH - (RW)
This register stores the 8-bit temperature threshold for event detection. The data is in 2’s complement
℃
format and the unit is in
.
For Example:
Threshol
d
45
℃
-
20
℃
Hex Value
0x2D 0x2D
0xEC 0xEC
T_H_
TH
These examples are also applied for setting the temperature middle and lower bound threshold registers as
introduced below.
6.2.5 T_M_TH - (RW)
This register stores the 8-bit temperature middle threshold for event detection. The data is in 2’s
complement format and the unit is in
℃.
6.2.6 T_L_TH - (RW)
PA_MODE bit is set to 1, the
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DataSheet HP206C
This register stores the 8-bit temperature lower bound threshold for event detection. The data is in 2’s
complement format and the unit is in
℃.
6.2.7 Improper Setting of Thresholds
Improperly setting the thresholds, such as setting the lower bound threshold to be larger than the upper
bound threshold, will lead to unexpected behavior of the device. It is recommended for the user to check
the status
of this bit indicates that improper setting of the thresholds occurs.
of the TH_ERR bit in the INT_SRC register after setting the thresholds into the device. Logic 1
6.3 Configure the Interrupts
There are 6 interrupts that can be generated by the device. They are:
6.3.1 PA_RDY
Indicates that the pressure (or altitude) measurement is done and the result is ready to read.
6.3.2 T_RDY
Indicate that the temperature measurement is done and the result is ready to read.
6.3.3 PA_TRAV
Indicate that the pressure (or altitude) value has traversed the middle threshold during the last
measurement.
6.3.4 T_TRAV
Indicate that the temperature value has traversed the middle threshold during the last measurement.
6.3.5 PA_WIN
Indicate that the pressure (or altitude) value locates outside the pre-defined window (the value in between
the upper bound and lower bound thresholds) during the last measurement.
6.3.6 T_WIN
Indicate that the temperature value locates outside the pre-defined window (the value in between the
upper bound and lower bound thresholds) during the last measurement.
The interrupt names prefixed by a ‘PA’ relate to the pressure (or altitude) measurement. The i
names
prefixed by a ‘T’ relate to the temperature measurement. These interrupts are all active-high and
will remain high until the interrupt-clearing conditions happen. The interrupt-clearing conditions are that
the device has received a new ADC result-reading command or a new ADC conversion command. There
are three registers available for the interrupt controls as shown below.
nterrup
6.3.7 INT_EN - (RW)
The INT_EN register allows the user to disable/enable each of the 6 interrupts (0: disable, 1: enable). When
the users need enable the traversal or window interrupt, they must also enable the corresponding
PA_RDY_EN or T_RDY_EN bit.
6.3.8 INT_CFG - (RW)
The INT_CFG register allows the user to select whether to output the interrupts from the INT1 pin (0: do not
output, 1: output). The register also contains a
detection parameters and the interrupts registers prefixed by a ‘PA_’ corresponds to the pressure or the
altitude measurement (0: pressure, 1: altitude).
control b
it ‘PA_MODE’ that selects whether the event
6.3.9 INT_SRC - (Read-only)
The INT_SRC register contains the interrupt flags that allow the user to know the interrupts status, as well
as a device status bit ‘DEV_RDY’ that tells whether the device is ready for access or not. The device is
ready when it is in the sleep state and is not performing the power-up sequence, the data conversions, and
any other command-based operations. The external MCU shall only access to the device while the device
is ready (DEV_RDY = 1).
If the INT_CFG bit is set to 0 while the INT_EN bit is set to 1, the corresponding interrupt flag will appear
HP206C_DataSheet_EN_V2.0 www.hoperf.com 13 / 17
t
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DataSheet HP206C
in the INT_SRC register but the interrupt will not be output to the INT1 pin.
6.3.10 INT_DIR - (Read-only)
The INT_DIR register allows the user to check the
For the T_WIN_DIR and the P_WIN_DIR status
or pressure value is above the window,
window, the status bit is read as
0.
corresponding status bit is read as 1; if the value is
the
For the T_TRAV_DIR and the P_TRAV_DIR status
temperature, pressure or altitude value has been
1; if the value has been falling from high to low,
as
read
Figure 2 shows how the 6 interrupts sources
be seen that, the “traversal” and
interrupts are enabled and set
high.
“window”
interrupts can only be set high while the
On the other hand, the status of the TH_ERR,
registers
without interrupt signals output to the
details
bits,
bits,
rising
are
controlled and mapped to the 2 interrupt output pins.
of the traversal or window interrupt
when the window interrupts happen, if the
when the traversal interrupts happen, if
from low to high, the corresponding status bit is
the
status bit is read as 0.
corresponding
DEV_RDY
and the four INT_DIR bits are only readable via
pins.
events.
temperature
below
the
the
It
can
“ready”
Pressure or Altitude
Ready Interrupt
Pressure or Altitude
Traversal Interrupt
Pressure or Altitude
Window Interrupt
Temperature
Ready Interrupt
Temperature
Traversal Interrupt
Temperature
Window Interrupt
PA_RDY_EN
PA_TRAV_EN
PA_WIN_EN
T_RDY_EN
T_TRAV_EN
T_WIN_EN
PA_RDY_CFG
PA_TRAV_CFG
PA_WIN_CFG
INT1
T_RDY_CFG
T_TRAV_CFG
T_WIN_CFG
Figure 2: Interrupts mapping diagram
6.3.11 INTERRUPTS GENERATION
The T related interrupts are generated as soon as
that
once the external MCU detect the T interrupts,
The PA related interrupts are generated as soon as
the
once
external MCU detect the PA interrupts, the
However, an additional 5 us is required to compute
conversion results. Therefore, after detecting the
reading the A computation
result.
the
temperature conversion is finished. This means
the
temperature conversion result is valid to
the
pressure conversion is finished. This means that
pressure
the
PA
interrupts, the MCU must wait another 5 us
conversion result is valid to
read.
altitude based on the temperature and
read.
pressure
before
6.3.12 INTERRUPTS CLEARING
The ADC_CVT, READ_PT or READ_AT command will clear the T_RDY and PA_RDY interrupts. Once
the ‘RDY’ interrupt is cleared, the ‘WIN’ and ‘TRAV’ interrupts will be cleared at the same time. However,
the ‘WIN’, ‘TRAV’ and ‘DIR’ register bits will remain their values until a new conversion is done.
The READ_P or READ_A command will only clear the PA_RDY interrupt. The T related interrupt and
register bits will not be changed by these 2 commands.
The READ_T command will only clear the T_RDY interrupt. The PA related interrupt and register bits will
not be changed by this
command.
The SOFT_RST will clear all the interrupts as well as the related register bits.
The interrupts are cleared
not necessarily mean that
once
an
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the device has confirmed a valid command is
interrupt must go low after a command is
fully
received.
However, this does
transmitted. For example, while
Page 15
DataSheet HP206C
being
an interrupt is
the device to
cleared by an ADC reading command, it goes low
the
external
MCU.
while
the data is being sent back from
6.4 Enable the Compensation
PARA - (RW)
This register has only one valid bit of CMPS_EN. The user can use this bit to determine whether to enable
the data compensation during the conversion process (0: disable, 1: enable). If it is enabled, the 24-bit or
48-bit data read out by the commands are fully compensated. If it is disabled, the data read out are the raw
data output.
7. Typical Application Circuit
Figure3: Typical application circuit
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Page 16
DataSheet HP206C
8. Package Information
Figure4: HP206C package outline
Notes:
Mechanical dimension is mm
General tolerance ±0.1
9. PIN CONFIGURATION
Table.9 – Pin Descriptions
Pin Name I/O Function
GND I
1
VDD I
2
INT1 O
3
`4
5
SDA IO
SCL I
6
NC -
Ground
power supply
Interrupt 1 output pin
NO Connect
I²C
serial bi-directional data pin
I²C
serial clock input pin
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Page 17
DataSheet HP206C
10. Tape and Reel Specifications
346.8 4.6
8
This document may contain preliminary information and is subject to
change by Hope Microelectronics without notice. Hope Microelectronics
assumes no responsibility or liability for any use of the information
contained herein. Nothing in this document shall operate as an express or
implied license or indemnity under the intellectual property rights of Hope
HOPE MICROELECTRONICS CO.,LTD
Add: 2/F, Building 3, Pingshan Private
Enterprise Science and Technology Park,
Lishan Road, XiLi Town, Nanshan District,
Shenzhen, Guangdong, China
+86 755 82973805
Te l:
Fax: +86 755 82973550
Email: sales@hoperf.com
Website: http://www.hoperf.com
http://www.hoperf.cn
Microelectronics or third parties. The products described in this document
are not intended for use in implantation or other direct life support
applications where malfunction may result in the direct physical harm or
injury to persons. NO WARRANTIES OF ANY KIND, INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF MECHANTABILITY
OR FITNESS FOR A ARTICULAR PURPOSE, ARE OFFERED IN THIS
DOCUMENT.
©2013, HOPE MICROELECTRONICS CO.,LTD. All rights reserved.
Rev:HP206C_DataSheet_EN_V2.0
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