| GND | MPR Series Sensor |
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| VO- 6 | 1 nF |
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| NC | 1 SS VO+ 4 Optional 2 MOSI/SDA NC 11 |
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| µC | To µC 3 SCL/SCLK EOC 8 Optional |
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| RES 9 | Optional VSS GND VCC 0.1 µF VDD |
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| Master | Pull-up resistors Rp Rp (Serial Clock Line) SCL (Serial Data Line) SDA |
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| Sensor 1 | Sensor 2 Sensor 3 MPR Series MicroPressure Board Mount Pressure Sensors Datasheet | automation.honeywell.com/hss | 14 TABLE 15. I2C STATUS BYTE EXPLANATION |
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| Bit (Meaning) | Status Comment 7 always 0 — 1 = device is powered Needed for the SPI Mode where the Master reads all zeroes 6 (Power indication) 0 = device is not powered if the device is not powered or in power-on reset (POR). Indicates that the data for the last command is not yet 5 (Busy flag) 1 = device is busy available. No new commands are processed if the device is busy. 4 always 0 — 3 always 0 — Indicates |
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| flag) | 1 = integrity test failed only during the power-up sequence. 1 always 0 — 1 = internal math saturation has 0 (Math saturation) — occurred TABLE 16. I2C OUTPUT MEASUREMENT COMMAND |
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| Step | Action Notes S SensorAddr 0 A Command A CmdData <15:8> A CmdData A P <7:0> Master to Sensor 7-bit Sensor to Master Write bit |
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| Option 1: Wait until the busy flag in | Option 2: Wait for at Option 3: Wait for the S Start condition |
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| the Status Byte clears. | least 5 ms for the data EOC indicator. |
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| conversion to occur. | P Stop condition 2 S SensorAddr 1 A Status N P 7-bit A Acknowledge Read bit To read the 24-bit pressure output along with the 8-bit Status Byte: N Not acknowledge S SensorAddr 1 A Status A SensorDat <23:16> A SensorDat A SensorDat N P <15:8> 3 <7:0> 7-bit Read bit MPR Series MicroPressure Board Mount Pressure Sensors Datasheet | automation.honeywell.com/hss | 15 TABLE 17. I2C SENSOR ADDRESS OF 0×1 |
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| Write bit | S Start condition |
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| S SensorAddr 1 A | Status N P N Not acknowledge 0x31 Read bit To read the 24-bit pressure output along with the 8-bit Status Byte: 0x18 1 3 S SensorAddr 1 A Status A SensorDat <23:16> A SensorDat A SensorDat N P |
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| <15:8> | <7:0> 0x31 Read bit TABLE 18. I2C BUS TIMING DIAGRAM AND PARAMETERS SDA |
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| tLOW | tSUDAT tHDSTA tBUS SCL |
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| tHDSTA | tHDDAT tHIGH tSUSTA tSUSTO |
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| Characteristic | Abbreviation Min. Typ. Max. Unit |
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| SCLK clock frequency | fSCL 100 — 400 kHz Start condition hold time relative to SCL edge tHDSTA 0.1 — — μs |
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| Minimum SCLK clock low width1 | tLOW 0.6 — — μs |
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| Minimum SCLK clock high width1 | tHIGH 0.6 — — μs Start condition setup time relative to SCL edge tSUSTA 0.1 — — μs Data hold time on SDA relative to SCL edge tHDDAT 0 — — μs Data setup time on SDA relative to SCL edge tSUDAT 0.1 — — μs |
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| Stop condition setup time on SCL | tSUSTO 0.1 — — μs Bus free time between stop condition and start condition tBUS 2 — — μs |
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| Output level low | Outlow — 0 0.2 VDD |
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| Output level high | Outhigh 0.8 1 — VDD |
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| Pull-up resistance on SDA and SCL | Rp 1 — 50 kOhm Combined low and high widths must equal or exceed minimum SCLK period. MPR Series MicroPressure Board Mount Pressure Sensors Datasheet | automation.honeywell.com/hss | 16 Serial.begin(9600); while (!Serial) { delay(10); Wire.begin(); sprintf(printBuffer, "\nStatus Register, 24 - bit Sensor data, Digital Pressure Counts,\ Percentage of full scale pressure, Pressure Output\n"); Serial |
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| Data Transmission Lines | MOSI |
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| SCLK: Signal Clock | MOSI |
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| MISO | Sensor 1 |
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| MOSI: Master Out/Sensor In | Master MISO |
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| MISO: Master In/Sensor Out | SS1 |
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| SS: Sensor Select | SS SS2 |
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| SS3 | SCLK MOSI Sensor 2 MISO SCLK MOSI Sensor 3 MISO SCLK |
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| MOSI | MSB Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 LSB |
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| Command | CmdData CmdData Sensor to Master 1 MOSI other than |
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| NOP | <15:8> <7:0> |
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| Option 1: Wait until the | Option 2: Wait for at least Option 3: Wait for the EOC “0×F0”. |
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| busy flag in the Status Byte | 5 ms for the data conversion indicator. |
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| clears. | to occur. 0xF0 Command |
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| tHDSS | tHIGH tLOW SCLK |
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| MOSI/MISO HiZ | HiZ |
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| tCLKD | tCLKD tSUSS tBUS |
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| SS drop to first clock edge | tHDSS 2.5 — — μs |
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| Minimum SCLK clock low width | 1 |
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| Minimum SCLK clock high width | 1 |
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| tHIGH | 0.6 — — μs |
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| Clock edge to data transition | tCLKD 0 — — μs |
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| Rise of SS relative to last clock edge | tSUSS 0.1 — — μs |
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| Bus free time between rise and fall of SS | tBUS 2 — — μs |
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| Output = | * (Pressure - Pmin.) + Outputmin. Pmax. - Pmin. (Output - Outputmin.) * (Pmax.- Pmin.) |
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| Pressure = | + Pmin. Outputmax. - Outputmin. Output max. = output at maximum pressure [counts] Output min. = output at minimum pressure [counts] Pmax. = maximum value of pressure range [bar, psi, kPa, etc.] Pmin. = minimum value of pressure range [bar, psi, kPa, etc.] Pressure = pressure reading [bar, psi, kPa, etc.] Output = digital pressure reading [counts] (14260634-1677722) * (1 - ( - 1)) |
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| Reflowable Protective Silicone Cap | Recommended Tubing |
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| assembly. | • Long port sensor: Figure 14 and Table 23. the straight port and lift the cap up vertically until it is no longer supported by the sensor housing. grasp of the tweezers. the vertical movement until the cap is free and clear of the sensor’s protective gel. during the cap removal process. TABLE 21. RECOMMENDED TUBING |
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| ID | OD Pressure at 25°C |
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| Manufacturer | Type Part Number (in) (in) (psi) |
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| Frelin-Wade | Fre-Thane® (polyurethane) 1A-156-11 0.093 0.156 210 |
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| NewAge Industries | PVC 1100225 0.094 0.156 42 |
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| Supplier | Part Number Material Hardness (mm) (mm) 4.00 2.00 McMaster 9262K163 Buna-N Durometer 70A 4.00 2.00 McMaster 1174N421 Buna-N Durometer 50A 4.00 2.00 McMaster 1185N82 Viton® Fluoroelastomer Durometer 75A 4.00 2.00 McMaster 9263K163 Viton® Fluoroelastomer Durometer 75A 4.00 2.00 McMaster 5233T47 silicone Durometer 70A 4.00 2.00 McMaster 1295N222 Viton® Fluoroelastomer Durometer 75A 4.00 2.00 McMaster |
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| or emergency stop devices or in any | materials and faulty workmanship during |
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