TE Connectivity Measurement Specialties 的 MSP300 Series 规格书

connecnmy \/RoHS Construction Output 04/2020 Page 1
SENSOR SOLUTIONS ///MSP300
Page 1
04/2020
FEATURES
APPLICATIONS
One Piece Stainless Steel
Construction
Ranges up to 15kpsi
Digital Pressure and Temperature
Output or Analog mV/Amplified
Output
±1 %Span Accuracy
UL Certification (analog only)
Pumps and Compressors
Hydraulic/Pneumatic Systems
Automotive Test Systems
Energy and Water Management
Medical Gas Pressure
Leak Detection
Remote Measuring Systems
General Pressure Measurements
MSP300
Pressure Transducer
SPECIFICATIONS
Analog Output or 14-Bit Digital Pressure with 11-Bit
Temperature Output
One Piece Stainless Steel Construction
Low Cost
17-4PH or 316L Stainless Steel
Customizable
The MSP300 pressure transducer from the Microfused line of TE
is suitable for measurement of liquid or gas pressure, even for
difficult media such as contaminated water, steam, and mildly
corrosive fluids.
The transducer pressure cavity is machined from a solid piece of
17-4PH or 316L stainless steel. The standard version includes a
1/4 NPT pipe thread allowing a leak-proof, all metal sealed system.
With excellent durability, there are no welds or organics exposed
to the pressure media.
TE’s proprietary Microfused technology, derived from demanding
aerospace applications, employs micromachined silicon
piezoresistive strain gages fused with high temperature glass to a
stainless steel diaphragm. This approach achieves media
compatibility simply and elegantly while providing an exceptionally
stable sensor without the PN junctions of conventional
micromachined sensors.
This product is geared towards industrial and commercial OEMs
for small to high volume applications. Standard configurations are
suitable for many applications. Please contact factory for your
customization needs.
Page 2 10/2021
MSP300
Pressure Transducer
SENSOR SOLUTIONS ///MSP300
10/2021
Page 2
STANDARD RANGES
Range (psi)
Gage/Compound
0 to 100
0 to 200
0 to 300
0 to 500
0 to 01k
0 to 03k
0 to 05k
0 to 10k
0 to 15k
ALL INTERMEDIATE RANGES ARE STANDARD
PERFORMANCE SPECIFICATIONS (ANALOG)
Supply Voltage: 5.0V, Ambient Temperature: 25°C (unless otherwise specified)
PARAMETERS
MIN
TYP
MAX
UNITS
NOTES
Pressure Accuracy (RSS combined Non Linearity,
Hysteresis & Repeatability)
-1
1
%Span
BFSL @ 25°C
Pressure Cycles
1.00E+6
0~F.S. Cycles
Proof Pressure
2X
Rated
Burst Pressure
5X
20000PSI
Rated
Whichever is less
Isolation, Body to Any Lead
50
MΩ
@ 250VDC
Long Term Stability (1 year)
-0.25
0.25
%Span
Zero Thermal Error
-2.0
2.0
%Span
Over comp. temp
Span Thermal Error
-2.0
2.0
%Span
Over comp. temp
Zero Offset (mV Output)
-3.0
3.0
%Span
@ 25°C
Zero Offset (V Output)
-2.0
2.0
%Span
@ 25°C
Span Tolerance
-2.0
2.0
%Span
@ 25°C
Compensated Temperature
0
55
°C
Operating Temperature
-20
+85
°C
Storage Temperature
-40
+85
°C
Load Resistance (RL, mV Output)
1
MΩ
Load Resistance (RL, V Output)
5
KΩ
Response Time
1
ms
Shock
50g, 11 msec Half Sine Shock per MIL-STD-202G, Method 213B, Condition A
Vibration
±20g, MIL-STD-810C, Procedure 514.2-2, Curve L
Wetted Material (except elastomer seal)
17-4PH or 316L Stainless Steel
For custom configurations, consult factory.
Page 3 10/2021
MSP300
Pressure Transducer
SENSOR SOLUTIONS ///MSP300
10/2021
Page 3
PERFORMANCE SPECIFICATIONS (DIGITAL)
Supply Voltage: 3.3V, Ambient Temperature: 25°C (unless otherwise specified)
PARAMETERS
MIN
TYP
MAX
UNITS
NOTES
Supply Voltage
2.7
5.0
VDC
Output at Zero Pressure
720
1000
1280
Count
Output at FS Pressure
14720
15000
15280
Count
Current Consumption
3.5
mA
Current Consumption (Sleep mode)
5
uA
Proof Pressure
2X
Rated
Burst Pressure
5X
20000PSI
Rated
Whichever is less
Isolation, Body to Any Lead
50
MΩ
@ 250VDC
Pressure Cycles
1.00E+6
0~F.S. Cycles
Pressure Accuracy (RSS combined Non Linearity,
Hysteresis & Repeatability)
-1
1
%Span
BFSL @ 25°C
Temperature Accuracy
-3
3
°C
1
Zero Thermal Error
-2.0
2.0
%Span
Over comp. temp
Span Thermal Error
-2.0
2.0
%Span
Over comp. temp
Long Term Stability (1 year)
-0.25
0.25
%Span
@ 25°C
Compensated Temperature
0
55
°C
Compensated Temperature Output
512
1075
Count
Response time
3
ms @ 4MHz
Non-sleep mode, 2
Response time
8.4
ms @ 4MHz
Sleep mode, 2
Operating Temperature
-20
+85
°C
Storage Temperature
-40
+85
°C
Shock
50g, 11 msec Half Sine Shock per MIL-STD-202G, Method 213B, Condition A
Vibration
±20g, MIL-STD-810C, Procedure 514.2-2, Curve L
Wetted Material (except elastomer seal)
17-4PH or 316L Stainless Steel
For custom configurations, consult factory.
Notes
1. Reflect pressure port diaphragm temperature over the compensated temperature range.
2. Response time is from power on to reading measurement data.
LWIRE CABLE.PVC.22AWG FOR ANALOG OUTPUT thRE CABLEJ’VCRZAWG FOR PC OUTPUT 5-WIRE CABLEPVCJZAWG FOR SPI OUTPUT E CONNECTION 10/2021 Page 4
MSP300
Pressure Transducer
SENSOR SOLUTIONS ///MSP300
10/2021
Page 4
DIMENSIONS
NOTE: FOR PRESSURE PORT CODE ‘W’, TYPICAL HEX DIMENSION WILL BE 1.260[32.00]
OUTPUT (ANALOG)
Code
Output
Supply
Ratiometricity
Red
Black
Green
White
1
0 – 50mV
5V
Yes
+Supply
-Supply
+Output
-Output
2
0 – 100mV
5V
Yes
+Supply
-Supply
+Output
-Output
3
0.5 – 4.5V
5 ± 0.25V
Yes
+Supply
Common
Cut Off
+Output
4
1 – 5V
10 – 30V
No
+Supply
Common
Cut Off
+Output
5
4 – 20mA
9 – 30V
No
+Supply
-Supply
Cut Off
Cut Off
OUTPUT (DIGITAL)
Code
Output
Supply
Red
Black
Green
White
Yellow
J
I2C
2.7 – 5.0V
+Supply
-Supply
SCL
SDA
--
S
SPI
2.7 – 5.0V
+Supply
-Supply
SCLK
MISO
SS
CODE
PORT
DIM C
2
1/4-19 BSPP
0.453[11.50]
4
7/16-20 UNF-A MALE SAE
J514 STRAIGHT THREAD O-
RING BUNA-N 70SH-904,
ID8.92mm x W1.83mm
0.435[11.05]
5
1/4-18 NPT
0.596[15.14]
6
1/8-27 NPT
0.475[12.06]
E
1/4-19 BSPT
0.50[12.70]
F
1/4-19 BSPP FEMALE
0.70[17.78]
K
1/8-27 NPT FEMALE
0.70[17.78]
P
7/16-20 UNF-2A FEMALE SAE
J514 STRAIGHT THREAD
WITH INTEGRAL VALVE
DEPRESSOR
0.689[17.50]
Q
M10 x 1.0 mm
0.42[10.67]
S
M12 x 1.5 mm
0.53[13.46]
U
G/14 DIN 3852 FORM E
GASKET DIN3869-14 NBR
0.519[13.18]
W
M20 x 1.5 mm
0.702[17.83]
CODE
CONNECTION TYPE
1
CABLE 2 FT
2
CABLE 4 FT
3
CABLE 10 FT
M
CABLE 1 M
N
CABLE 2 M
P
CABLE 5 M
(ANALOG ONLY)
R
CABLE 10 M
(ANALOG ONLY)
S ENSOR OUTPUT AT SIGNIFICANT PERCENTAGES % OUTPUT DIGITAL COUNTS (DECIMAL) DIGITAL COUNTS (HEX) 0% 1000 0 X SE8 5% 1700 0 x 6A4 10% 2400 0 X 960 50% 8000 O X 1F4O 90% 13600 0 x 3520 95% 14300 0 X 3700 100% 15000 0 X 3A98 15000 - 14000 13000 12000 A 11000 7 .‘2 2 10000 a o 9000 U u 8000 III 9 7000 3.“. 5000 3. D 5000 * fl. 5 4000 O 3000 2000 1000 0 . ‘ I 0% 20% 40% 60% 80% 100% Pmin PRESSURE RANGE Pmax 15000-1000 OUTPUT (DECIMAL COUNTS) = Pmax - Pmin x (Papplied - Pmin)+1000 1012021 Page 5
MSP300
Pressure Transducer
SENSOR SOLUTIONS ///MSP300
10/2021
Page 5
PRESSURE OUTPUT
TEMPERATURE OUTPUT OUTPUT °C DIGITAL COUNTS (DECIMAL) DIGITAL COUNTS (HEX) 0 512 0 X 200 10 614 0 X 266 25 767 0 x 2FF 40 921 0 x 399 55 1075 0 x 433 1100 ‘ OUTPUT (2" DEC COUNTS) 200 1007 0 r: , T T - 0 5 10 15 20 25 30 35 40 45 50 55 60 Tmin TEMPERATURE uC Tmax (OUTPUT°C+50°C)X2048 OUTPUT (DECIMAL COUNTS) = 15 0° c ( 50,0) 102021 Page 6
MSP300
Pressure Transducer
SENSOR SOLUTIONS ///MSP300
10/2021
Page 6
TEMPERATURE OUTPUT
'Digwal Op|icms Au Imermemate Ranges are Standard SPI Damn Code ‘0' 10/2021 page 7
MSP300
Pressure Transducer
SENSOR SOLUTIONS ///MSP300
10/2021
Page 7
ORDERING INFORMATION
M30 3 3 – 1 0 0 0 0 K – 350B G
Output
Code
Output Signal
Supply Voltage
1
0-50mV
5V
2
0-100mV
5V
3
0.5-4.5V
5±0.25V
4
1-5V
10-30V
5
4-20mA
9-30V
J*
I2C
2.7-5.0V
S*
SPI
2.7-5.0V
Pressure Reference
G
Gauge
C
Compound
Pressure Ranges
Psi
Std
Bar
Std
100P
007B
200P
010B
300P
020B
500P
035B
01KP
070B
03KP
200B
05KP
350B
10KP
700B
15KP
01KB
Cable Length
1
2 feet
2
4 feet
3
10 feet
M
1 meter
N
2 meter
P
5 meter
(Analog only)
R
10 meter
(Analog only)
Pressure Port
Code
Port Type
Dim C
2
1/4-19 BSPP
0.453[11.50]
4
7/16-20 UNF-2A Male SAE J514
Straight Thread O-Ring Boss O-Ring
BUNA-N 70SH-904
ID8.92mm X W1.83mm
0.435[11.05]
5
1/4-18 NPT
0.596[15.14]
6
1/8-27 NPT
0.475[12.06]
E
1/4-19 BSPT
0.50[12.70]
F
1/4-19 BSPP Female
0.70[17.78]
K
1/8-27 NPT Female
0.70[17.78]
P
7/16-20 UNF-2A Female SAE J514
Straight Thread w/ Integral Valve
Depressor
0.689[17.50]
Q
M10x1.0mm
0.420[10.67]
S
M12x1.5mm
0.53[13.90]
U
G1/4 DIN 3852 Form E Gasket
DIN3869-14 NBR
0.547[13.90]
W
M20 x 1.5mm
0.702[17.83]
Port Material
0
17-4PH Stainless Steel
1
316L Stainless Steel
Cleaning
0
No Selection
1
Oxygen Clean B40.1, Level IV
Sleep (Digital Only)
0
Non-sleep Mode
1
Sleep Mode
Code Address for I2C (Digital Only)
0
0X28H
1
0x36H
2
0x46H
3
0x48H
4
0x51H
All Intermediate Ranges are Standard
*Digital Options
SPI Default Code ‘0’
Au Imermemate Ranges are Standard e .31 73 624 5999 customemm,nm(@wmm wsmmercare lcsh customelcare.shzn@le.com TE.comlsensorsolulions 10/2021 _: TE Page a
MSP300
Pressure Transducer
SENSOR SOLUTIONS ///MSP300
10/2021
Page 8
OLD ORDERING INFORMATION
MSP-300-100 – P – 5 – P – 1
Pressure Ranges
Psi
Std
Bar
Std
100
007
200
010
300
020
500
035
01K
070
03K
200
05K
350
10K
700
15K
01K
Cable Length
1
2 feet
2
4 feet
3
10 feet
M
1 meter
N
2 meter
P
5 meter
R
10 meter
Code
Port Type
B
1/4-19 BSPP
D
7/16-20 UNF-2A Male SAE J514
Straight Thread O-Ring Boss O-Ring
BUNA-N 70SH-904
ID8.92mm X W1.83mm
N
1/4-18 NPT
A
1/8-27 NPT
E
1/4-19 BSPT
F
1/4-19 BSPP Female
H
1/8-27 NPT Female
P
7/16-20 UNF-2A Female SAE J514
Straight Thread w/ Integral Valve
Depressor
Q
M10x1.0mm
S
M12x1.5mm
C
G1/4 DIN 3852 Form E Gasket
DIN3869-14 NBR
W
M20 x 1.5mm
Pressure Unit
P
Psi
B
Bar
Output
Code
Output Signal
Supply Voltage
1
0-50mV
5V
2
0-100mV
5V
3
0.5-4.5V
5±0.25V
4
1-5V
10-30V
5
4-20mA
9-30V
TE.com/sensorsolutions
Measurement Specialties, Inc., a TE Connectivity company.
Measurement Specialties, TE Connectivity, TE Connectivity (logo) and EVERY CONNECTION COUNTS are trademarks. All other logos, products and/or company names referred to herein
might be trademarks of their respective owners.
The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes o nly, is believed to be reliable. However, TE Connectivity makes
no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard
Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse
of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application.
© 2015 TE Connectivity Ltd. family of companies All Rights Reserved.
NORTH AMERICA
Measurement Specialties, Inc.,
a TE Connectivity Company
Phone: 800-522-6752
Email: customercare.frmt@te.com
EUROPE
Measurement Specialties (Europe), Ltd.,
a TE Connectivity Company
Phone: +31 73 624 6999
Email: customercare.lcsb@te.com
ASIA
Measurement Specialties (China), Ltd.,
a TE Connectivity Company
Phone: 0400-820-6015
Email: customercare.shzn@te.com
All Intermediate Ranges are Standard
-=TE connecrivll)’ IZC Transmission Start Condition VDD Master R ’ ”v slave (45x5no) SDA SCL Bum bu: llnes‘ sun and SCL are nmmmna: and merelnre reflmle 3n exiemnl Dull-uu resmm 10/2021 page 9
MSP300
Pressure Transducer
SENSOR SOLUTIONS ///MSP300
10/2021
Page 9
INTERFACING TO TE
DIGITAL PRESSURE
MODULES
The TE series of digital pressure sensors uses the latest CMOS sensor
conditioning circuitry (SSC) to create a low cost, high performance digital output
pressure (14-bit) and temperature (11-bit) sensor designed to meet the strictest
requirements from OEM customers.
The MS45x5DO, 85BSD, 85FBSD, 86BSD,154BSD, MSP100(DO) and
MSP300(DO) , M3200(DO), FX29(DO) and FS30(DO)are the latest offering from
TE to offer digital communication to pressure sensor OEMs.
I2C AND SPI INTERFACE SPECIFICATIONS
1. I2C Interface Specification
The I2C interface is a simple 8-bit protocol using a serial data line (SDA) and a serial clock line (SCL) where each device connected to the
bus is software addressable by a unique address. For detailed specifications of the I2C protocol, see The I2C Bus Specification, Version 2.1,
January 2000.
. Iteface Coectio-Exteal
Bi-directional bus lines are implemented by the devices (master and slave) using open-drain output stages and a pull-up resistor connected
to the positive supply voltage. The recommended pull-up resistor value depends on the system setup (capacitance of the circuit or cable and
bus clock frequency). In most cases, 4.7kΩ is a reasonable choice. The capacitive loads on SDA and SCL line have to be the same. It is
important to avoid asymmetric capacitive loads.
. IC Addess
The I2C address consists of a 7-digit binary value. The factory setting for the I2C slave address is 0x28, 0x36 or 0x46 depending on the
interface type selected from the ordering information. The address is always followed by a write bit (0) or read bit (1). The default
hexadecimal I2C header for read access to the sensor is therefore 0x51, 0x6D, 0x8D respectively, based on the ordering information.
IQC Transmission Start Condition SDA SCL START condition A HIGH to LOW transition on the SDA line while SCL is HIGH IZC Transmission Stop Condition SDA SCL p STOP condition A LOW to HIGH transition on the SDA line while SCL is HIGH IOIZDZI Page to
MSP300
Pressure Transducer
SENSOR SOLUTIONS ///MSP300
10/2021
Page 10
. INT/SS Pi
When programmed as an I2C device, the INT/SS pin operates as an interrupt. The INT/SS pin rises when new output data is ready and falls
when the next I2C communication occurs.
. Tasfe Seueces
Transmission START Condition (S): The START condition is a unique situation on the bus created by the master, indicating to the slaves
the beginning of a transmission sequence (the bus is considered busy after a START).
Transmission STOP Condition (P): The STOP condition is a unique situation on the bus created by the master, indicating to the slaves the
end of a transmission sequence (the bus is considered free after a STOP).
Acknowledge (ACK) / Not Acknowledge (NACK): Each byte (8 bits) transmitted over the I2C bus is followed by an acknowledge condition
from the receiver. This means that after the master pulls SCL low to complete the transmission of the 8th bit, SDA will be pulled low by the
receiver during the 9th bit time. If after transmission of the 8th bit the receiver does not pull the SDA line low, this is considered to be a NACK
condition.
If an ACK is missing during a slave to master transmission, the slave aborts the transmission and goes into idle mode.
I
2
C Transmission Start Condition
A HIGH to LOW transition on the SDA line while SCL is HIGH
SDA
SCL
START condition
I
2
C Transmission Stop Condition
A LOW to HIGH transition on the SDA line while SCL is HIGH
STOP condition
SDA
SCL
SDA SCL ‘ \L—‘ 1 0/2021 Page 11
MSP300
Pressure Transducer
SENSOR SOLUTIONS ///MSP300
10/2021
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I2 C ACKNOWLEDGE / NOT ACKNOWLEDGE
Each byte is followed by an acknowledge or a not
acknowledge, generated by the receiver
1.5 Data Transfer Format
Data is transferred in byte packets in the I2C protocol, which means in 8-bit frames. Each byte is followed by an acknowledge bit. Data is
transferred with the most significant bit (MSB) first.
A data transfer sequence is initiated by the master generating the Start condition (S) and sending a header byte. The I2C header consists of
the 7-bit I2C device address and the data direction bit (R/_W).
The value of the R/_W bit in the header determines the data direction for the rest of the data transfer sequence. If R/_W = 0 (WRITE), the
direction remains master-to-slave, while if R/_W = 1 (READ), the direction changes to slave-to-master after the header byte.
1.6 Command Set and Data Transfer Sequences
The I2C master command starts with the 7-bit slave address with the 8th bit = 1 (READ). The sensor acts as the slave and sends an
acknowledge (ACK) indicating success. The sensor has four I2C read commands: Read_MR, Read_DF2, Read_DF3, and Read_DF4.Figure
1.6 shows the structure of the measurement packet of the four I2C read commands, which are explained in sections 1.6.1.
(1) PC Rent1_MR - Measurement Request Sllve mm I measurement Ind DSP cllculllion cycle. DeviosslaveAddress s a s 4- : 2 I a RA 9 E|(example:EiI5) El Slafl Condillm \ / L Data Bl Davlce Slave Wart for (gamma- an 2) Address [5 a] Slave ACK Read/Wrila Bil (exampte. Ream) (1) Fc RutLDFi — Data Fatah 2 Byhs: Slnva rlfiuml nnly hn'dg! dill In the miller in 2 byte!- 3] AMHOMMQB (ACK) SEI452IflRA-1lii1lifilIAYIG‘l1210NI NoAcknowledge (NAG-o \ / t \. / t y / \ Davies stave w-it tor Bridge nata Master Bridge Dam Maslsr El 3“,” 9mm" Addvass {s a] Slave ACK [13 31 ACK [7 0} NACK I Status Bit (3) Fc Read_DF3 — Data Fetch 3 Bytes: stave rerurrre 2 bridge data bytes 8. mmplratun nigh byte tmman to mastarr SSEAJIIDR .11121uotIlA7§£4::InA-Iull1:541": \ ‘ t t V \ Devree Slave Wall lor Hnuge Date Master Enflge Dara Masle! Temperature Master Address [6,0] Slave ACK [13:51 ACK [19] ACK Dana [10 3] NACK (4) Pc ReatLDn- nan FetchAEyhes: Slave returns 2 bridgl am bytes .1. 2 hmplrilurl hyhs «nomad (mmxmrqte met-r. SiiiaiiflRA-HHNIOIDATI IOAI°|I1GS43AI1IXIIXXNS Davree Slave Weirrw Bndge Data Master Elidge- Master Temperature Master Temperamw Masrer Addvesslfi'o] Slaw ACK [138] ACK Dam ACK Datn[10'3] ACK Dale [2'0] MACK [7 0] totznzt Page t2
MSP300
Pressure Transducer
SENSOR SOLUTIONS ///MSP300
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.6. Figue .6 – IC Measueet Packet ReadsIC Read_DF Data Fetch
For Data Fetch commands, the number of data bytes returned by the sensor, is determined when the master sends the NACK and stop
condition. For the Read_DF3 data fetch command (Data Fetch 3 Bytes; see example 3 in Figure 1.6), the sensor returns three bytes in
response to the master sending the slave address and the READ bit (1): two bytes of bridge data with the two status bits as the MSBs and
then 1 byte of temperature data (8-bit accuracy). After receiving the required number of data bytes, the master sends the NACK and stop
condition to terminate the read operation. For the Read_DF4 command, the master delays sending the NACK and continues reading an
additional final byte to acquire the full corrected 11-bit temperature measurement. In this case, the last 5 bits of the final byte of the packet
are undetermined and should be masked off in the application. The Read_DF2 command is used if corrected temperature is not required.
The master terminates the READ operation after the two bytes of bridge data (see example 2 in Figure 1.6).
The two status bits (Bit 15 and Bit 14) give an indication of stale or valid data depending on their value. A returned value of 00 indicate
“normal operation and a good data packet” while a returned value of 10 indicates “stale data that has been already fetched”. See section 1.7
for additional details. Users that use “status bit” polling should select a frequency slower than 20% more than the update time.
1.7 Status Bits and Diagnostic Features
The table below summarizes the status bits conditions indicated by the 2 MSBs (Bit (15:14) of I2C data packet, S(1:0) of SPI data packet of
the bridge high byte data.
Status Bits Normal Operatwon Good Data Packet Reserved 10 Stale Da'a. Data has been fetched since last measuremenl cycle. Faull Detected 1 0/2021 Page 13
MSP300
Pressure Transducer
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Table 1: Status Bits Encoding
Status Bits
(2 MSB of Output Data Packet)
Definition
00
Normal Operation. Good Data Packet
01
Reserved
10
Stale Data. Data has been fetched since last measurement cycle.
11
Fault Detected
The SSC is has on board diagnostic features to ensure robust system operation in the most “mission-critical” applications. A status bit value
of “11” indicates a fault condition in the SSC or sensing element. All diagnostics are detected in the next measurement cycle and reported in
the subsequent data fetch. Once a diagnostic is reported, the diagnostic status bits will not change unless both the cause of the diagnostic is
fixed and a power-on-reset is performed.
1.8 I2C Protocol Differences
There are three differences in the described above protocol compared with original I2C protocol:
Sending a start-stop condition without any transitions on the SCL line (no clock pulses in between) creates a communication error for
the next communication, even if the next start condition is correct and the clock pulse is applied. An additional start condition must be
sent, which results in restoration of proper communication.
The restart condition – a falling SDA edge during data transmission when the SCL clock line is still high – creates the same situation.
The next communication fails, and an additional start condition must be sent for correct communication.
A falling SDA edge is not allowed between the start condition and the first rising SCL edge. If using an I2C address with the first bit 0,
SDA must be held down from the start condition through the first bit.
2. SPI Interface Specification
SPI is a general-purpose synchronous serial interface. During an SPI transfer, transmit and receive data is simultaneously shifted out and in
serially. A serial clock line synchronizes the shifting and sampling of the information on two serial data lines.
SPI devices communicate using a master-slave relationship. Due to its lack of built-in device addressing, SPI requires more effort and more
hardware resources than I2C when more than one slave is involved. But SPI tends to be simpler and more efficient than I2C in point-to-point
(single master, single slave) applications for the very same reason; the lack of device addressing means less overhead.
The SPI interface is programmed for falling-edge MISO change.
e SPI Tmerface will have daTa change aherlhe laTTirlg edge ol SCLK, The masTer shouId samole MISO on The rise of SCLK The pm oackel is 4 bytes (32 blls), The high brldge daTa byTe comes lirsT, foIlowed by The Iow bridge dala byte Then M les ol corr peraTure (T[|0,D]) are sehT. lirsl The T[10,3]byte and Then The (T[2,ol,xxxxx) byTe. The TasT 5 oils of The Trial byle are undeTerm be masked off in The appllcallon. If The user only requires The correcTed brldge value, The read can be TerrmnaTed aTTer Th ed Temperamre IS also requlred TwT only aT an a-oiT resqullorT‘ The read can be TerrmhaTed alTer The 3rd byTe is read fl 1 U L J T TT Tr Mlso HiZ T ST I: so I B13): BTZ‘I I B7 IBS ‘1 Iao T TTOI: 19 I T 11 ITO T‘Q’I HIZ $5 I TI IZC INTERFACE PARAMETERS PARAMETERS SYMBOL MIN TYP MAX UNITS SCLK CLOCK FREQUENCY f 100 400 KHZ START CONDITION HOLD TIME RELATIVE TO SCL EDGE [ A 0.1 US MINIMUM SCL CLOCK LOW WIDTH I | 0.6 US MINIMUM SCL CLOCK HIGH WIDTHI l H 0.6 US START CONDITION SETUP TIME RELATIVE TO SCL EDGE ‘ 0.1 US DATA HOLD TIME ON SDA RELATIVE TO SCL EDGE ‘ A 0 US DATA SETUP TIME ON SDA RELATIVE TO SCL EDGE [ 0.1 US STOP CONDITION SETUP TIME ON SCL ‘ 0.1 US BUS FREE TIME BET‘NEEN STOP AND START CONDITION | S 2 US TGT‘ZDZT page M
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. SPI Read_DF Data Fetch
The SPI interface will have data change after the falling edge of SCLK. The master should sample MISO on the rise of SCLK. The entire
output packet is 4 bytes (32 bits). The high bridge data byte comes first, followed by the low bridge data byte. Then 11 bits of corrected
temperature (T[10:0]) are sent: first the T[10:3]byte and then the {T[2:0],xxxxx} byte. The last 5 bits of the final byte are undetermined and
should be masked off in the application. If the user only requires the corrected bridge value, the read can be terminated after the 2nd byte. If
the corrected temperature is also required but only at an 8-bit resolution, the read can be terminated after the 3rd byte is read.
Packet = [ {S(1:0),B(13:8)},{B(7:0)},{T(10:3)},{T(2:0),xxxxx}] Where
S(1:0) = Status bits of packet (normal, command, busy, diagnostic) B(13:8) = Upper
6 bits of 14-bit bridge data.
B(7:0) = Lower 8 bits of 14-bit bridge data.
T(10:3) = Corrected temperature data (if application does not require corrected temperature, terminate read early) T(2:0),xxxxx =.
Remaining bits of corrected temperature data for full 11-bit resolution
HiZ = High impedance
Figure 2.2 – SPI Output Packet with Falling Edge SPI_Polarity
TIMING DIAGRAMS
I2C INTERFACE PARAMETERS
PARAMETERS
SYMBOL
MIN
TYP
MAX
UNITS
SCLK CLOCK FREQUENCY
fSCL
100
400
KHz
START CONDITION HOLD TIME RELATIVE TO SCL EDGE
tHDSTA
0.1
uS
MINIMUM SCL CLOCK LOW WIDTH 1
tLOW
0.6
uS
MINIMUM SCL CLOCK HIGH WIDTH 1
tHIGH
0.6
uS
START CONDITION SETUP TIME RELATIVE TO SCL EDGE
tSUSTA
0.1
uS
DATA HOLD TIME ON SDA RELATIVE TO SCL EDGE
tHDDAT
0
uS
DATA SETUP TIME ON SDA RELATIVE TO SCL EDGE
tSUDAT
0.1
uS
STOP CONDITION SETUP TIME ON SCL
tSUSTO
0.1
uS
BUS FREE TIME BETWEEN STOP AND START CONDITION
tBUS
2
uS
1COMBINED LOW AND HIGH WIDTHS MUST EQUAL OR EXCEED MINIMUM SCL PERIOD.
SCL IHDDAI tHumn IHIGH SPI INTERFACE PARAMETERS PARAMETERS SYMBOL MIN TYP MAX UNITS SCLK CLOCK FREQUENCY f 50 800 KHZ SS DROP TO FIRST CLOCK EDGE ‘ 2.5 uS MINIMUM SCL CLOCK LOW WIDTH I I 0.6 uS MINIMUM SCL CLOCK HIGH WIDTH I t H 0.6 uS CLOCK EDGE TO DATA TRANSITION t u 0 0.1 uS RISE OF SS RELATIVE TO LAST CLOCK EDGE t 0.1 uS BUS FREE TIME BETWEEN RISE AND FALL OF SS 1 E US COMBINED LOW AND HIGH WIDTHS MUST EQUAL OR EXCEED MINIMUM SCLK PERIOD. SPI TIMING DIAGRAM SCLK «, (MISS MISO Hm I I I Hm aim”. , \ ss \ I ‘2021 Page 15
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IC Tiig Diaga
PARAMETERS
SYMBOL
MIN
TYP
MAX
UNITS
SCLK CLOCK FREQUENCY
fSCL
50
800
KHz
SS DROP TO FIRST CLOCK EDGE
tHDSS
2.5
uS
MINIMUM SCL CLOCK LOW WIDTH 1
tLOW
0.6
uS
MINIMUM SCL CLOCK HIGH WIDTH 1
tHIGH
0.6
uS
CLOCK EDGE TO DATA TRANSITION
tCLKD
0
0.1
uS
RISE OF SS RELATIVE TO LAST CLOCK EDGE
tSUSS
0.1
uS
BUS FREE TIME BETWEEN RISE AND FALL OF SS
tBUS
2
uS
1 COMBINED LOW AND HIGH WIDTHS MUST EQUAL OR EXCEED MINIMUM SCLK PERIOD.
C Code Example For FX29
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//Note: The C code is use for communication with FX29K0-040B-0100-L using STM32L031.
// This routine is applicable to other models mentioned in this document.
#include "main.h"
#include "stm32l0xx_hal.h"
#include "stdlib.h"
#include "delay.h"
#include "config.h"
u8 temp[7];
float Tscope,Pscope,Tdisplay,Pdisplay;
float Lmax=100,Lmin=0；//Span 100L，Zero 0L, Span should be defined by the sensor
pressure range of customer used. 100 means pressure range of 100L
u32 Pvalue,Tvalue,Tspan,Pspan;
u16 P1=1000,P2=15000;
void SDA_IN2(void);
void SDA_OUT2(void);
void IIC_Start2(void);
void IIC_Stop2(void);
unsigned char IIC_Wait_Ack2(void);
void IIC_Ack2(void);
void IIC_NAck2(void);
void IIC_Send_Byte(unsigned char txd);
unsigned char IIC_Read_Byte(unsigned char ack);
float Get_I2CValue(void);
void SDA_IN2()
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.Pin = SDA2_Pin;
GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
GPIO_InitStructure.Pull = GPIO_NOPULL;
//GPIO_InitStructure.Alternate = GPIO_PuPd_UP;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(SDA2_GPIO_Port, &GPIO_InitStructure);
}
void SDA_OUT2()
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.Pin = SDA2_Pin;
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GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(SDA2_GPIO_Port, &GPIO_InitStructure);
}
void IIC_Start2()
{
SDA_OUT2(); //sda???
Sensor_SDA_ON ;
Sensor_SCL_ON;
delay_us(4);
Sensor_SDA_OFF;//START:when CLK is high,DATA change form high to low
delay_us(4);
Sensor_SCL_OFF;//??I2C??,?????????
}
void IIC_Stop2()
{
SDA_OUT2();//sda???
Sensor_SCL_OFF;
Sensor_SDA_OFF;//STOP:when CLK is high DATA change form low to high
delay_us(4);
Sensor_SCL_ON;
Sensor_SDA_ON ;//??I2C??????
delay_us(4);
}
unsigned char IIC_Wait_Ack2()
{
unsigned char ucErrTime=0;
SDA_IN2(); //SDA?????
Sensor_SDA_ON ;delay_us(1);
Sensor_SCL_ON;delay_us(1);
while(READ_Sensor_SDA)
{
ucErrTime++;
if(ucErrTime>250)
{
IIC_Stop2();
return 1;
}
}
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Sensor_SCL_OFF;//????0
return 0;
}
void IIC_Ack2()
{
Sensor_SCL_OFF;
SDA_OUT2();
Sensor_SDA_OFF;
delay_us(2);
Sensor_SCL_ON;
delay_us(2);
Sensor_SCL_OFF;
}
void IIC_NAck2()
{
Sensor_SCL_OFF;
SDA_OUT2();
Sensor_SDA_ON;
delay_us(2);
Sensor_SCL_ON;
delay_us(2);
Sensor_SCL_OFF;
}
void IIC_Send_Byte(unsigned char txd)
{
unsigned char t;
SDA_OUT2();
Sensor_SCL_OFF;//??????????
for(t=0;t<8;t++)
{
if(txd&0x80)
{Sensor_SDA_ON;}
else
{Sensor_SDA_OFF;}
txd<<=1;
delay_us(2); //?TEA5767??????????
Sensor_SCL_ON;
delay_us(2);
Sensor_SCL_OFF;
delay_us(2);
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}
}
unsigned char IIC_Read_Byte(unsigned char ack)
{
unsigned char i,receive=0;
SDA_IN2();//SDA?????
for(i=0;i<8;i++ )
{
Sensor_SCL_OFF;
delay_us(2);
Sensor_SCL_ON;
receive<<=1;
if(READ_Sensor_SDA)receive++;
delay_us(1);
}
if (!ack)
IIC_NAck2();//??nACK
else
IIC_Ack2(); //??ACK
return receive;
}
u8 I2C_ERR=0;
float Get_I2CValue()
{
//Wake_up，if non-sleep mode this part is no needed.
IIC_Start2(); //MR command
IIC_Send_Byte(0x51);
IIC_Wait_Ack2();
IIC_Stop2();
HAL_Delay(2); //2ms
delay
////////////////////////////////////////////////////////////////////////////////////////
IIC_Start2(); //DF4
IIC_Send_Byte(0x51);
IIC_Wait_Ack2();
temp[0]=IIC_Read_Byte(1);
temp[1]=IIC_Read_Byte(1);
temp[2]=IIC_Read_Byte(1);
temp[3]=IIC_Read_Byte(0);
NORTH AMERICA EUROPE ASIA Measuremenl Speclallles, Inc., a MEAS Sw «and San, 3 Measurement Speclanies lcmna) m1, TE Cunnecllmy comp TE Cannes“ 3 TE Cunn Nunhpun Lump Wesl on. Chaplin; No 25 La Fremunl, CA 3453a 2022 Bevaix Shenzhe , Tel. .l sou 757 was Tel +41 32 an 9550 Shenzh Fax .l 510 4951575 Fax +41 32 547 9593 cm“ ous|omercare hm|@|e om custamelca bevx@le com Tel, ~55 755 3330 5085 Fax. .55 755 3330 5099 cusmmercar shm@|e om 10/2021 page 20 —:TE
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IIC_Stop2();
if((temp[0]&0xc0)==0x00)
{
Pvalue=(temp[0]<<8) | temp[1];
Tvalue=(temp[2]<<3) | (temp[3]>>5);
I2C_ERR=0;
}
else
I2C_ERR=1;
Tscope=200;//-50~150
Tspan=2048;//11bit
if(I2C_ERR==0)
{
Pspan=P2-P1;
Tdisplay=Tvalue*Tscope/Tspan-50;
Pdisplay=Pvalue*(Lmax-Lmin)/Pspan+Lmin;//100L
}
return Pdisplay;
}
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