SM9235-BCE-S-300-002

te.com SMI ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/ SM9333/SM9336 Series Gage & Differential Pressure Sensors The SM9000 series are digital, ultra-low pressure sensors offering state-of-the-art MEMS pressure transducer technology and CMOS mixed signal processing technology to produce a digital, fully conditioned, multi-order pressure and temperature compensated sensor in JEDEC standard SOIC-16 package with a dual vertical porting option (dual horizontal porting available for selected configurations). It is available in a gage and a differential pressure configuration. The total error band after board mount and system level autozero is less than 1%FS. The warmup behavior and long-term stability further confirms its expected performance over the life of the part. Features  Pressure ranges:   125 and 250 Pa Differential 250 up to 600 Pa Gage  Total error band after Autozero: < 1%FS  16-bit I2C Digital interface  Pressure calibrated and temperature compensated output Combining the pressure sensor with a signal-conditioning ASIC in a single package simplifies the use of advanced silicon micro-machined pressure sensors. The pressure sensor can be mounted directly on a standard printed circuit board and a high level, calibrated pressure signal can be acquired from the digital interface. This eliminates the need for additional circuitry, such as a compensation network or microcontroller containing a custom correction algorithm. The SM9233/SM9235/SM9236/SM9333/SM9336 are shipped in sticks or tape & reel.  Compensated temperature range: -20 to 85oC Applications  CPAP / Sleep Apnea  Ventilator  Gas Flow Instrumentation  Air Flow Measurement  HVAC / VAV  Pressure Transmitter  Pressure Switches  Pneumatic Gauges  Safety Cabinets TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 1 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series Performance Specifications 1. Absolute Maximum Ratings All parameters are specified at VDD = 3.3 V supply voltage at 25°C, unless otherwise noted. Characteristic Symbol VDD Min Max Units 3.0 5.5 V Digital IO Voltage VIO,DIG -0.3 VDD+0.3 V Max. Digital IO Current (DC) IIO,DIG -10 +10 mA +125 °C Supply Voltage TSTG -40 Proof Pressure (a, c) PProof 7 (1.0) kPa (PSI) Burst Pressure (a, d) PBurst 20 (2.9) kPa (PSI) Storage Notes: a) b) c) d) Temperature(a,b) Tested on a sample basis. Clean, dry air compatible with wetted materials. Wetted materials include silicon, glass, RTV (silicone), gold, aluminum, copper, nickel, palladium, epoxy, stainless steel and plastic (mold compound). Proof pressure is defined as the maximum pressure to which the device can be taken and still perform within specifications after returning to the operating pressure range. Burst pressure is the pressure at which the device suffers catastrophic failure resulting in pressure loss through the device. 2. ESD Description Symbol Min Max Units ESD HBM Protection at all Pins VESD(HBM) -2 2 kV 3. External Components Description Supply bypass capacitor* I2C Data and clock pull up resistors* Symbol CVDD Min RP Typ 100 4.7 Max Units nF kOhm * Not tested in production 4. Calibrated Pressure Ranges Device Type SM9233 – 250 Gage SM9235 – 300 Gage SM9236 – 600 Gage SM9333 – 125 Differential SM9336 – 250 Differential PMIN (Pa) PMAX (Pa) 0 0 0 -125 -250 +250 +300 +600 +125 +250 TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 2 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series 5. Recommended Operating Conditions The recommended operating conditions must not be exceeded in order to provide proper functionality of the device. All parameters specified in the following sections refer to these recommended operating conditions unless stated otherwise. Description Symbol Supply Voltage Low level input voltage at SDA, SCL High level input voltage at SDA, SCL Compensated Temperature (b) Operating Temperature Notes: a) Min VVDD 3.0 VIN,I2C,lo VIN,I2C,hi TCOMP TA -0.3 0.8 * VVDD Typ 3.3 5.5 3.6 Max SM9233/SM9235/SM9236 SM9333/SM9336 0.9 VVDD+0.3 -20 -20 +85 85 Units V V V °C °C Clean, dry air compatible with wetted materials. 6. Operating Characteristics Table All parameters are specified at Vdd = 3.3 V or 5 V DC supply voltage (as per PART NUMBER in table 9 (ORDERING INFORMATION)) at 25 oC, unless otherwise noted. Characteristic Series (e) Supply Current at 3.3V (e) Supply Current at 5.0V (e) Supply Current at 3.3V (e) Supply Current at 5.0V @ Digital Pressure Output PMIN @ Digital Pressure Output PMAX Digital Full Scale Span Resolution (Digital Output) Update Rate Digital Output Total Error Band after Autozero (f, g, h) Digital Output Total Error Band (f) Bandwidth Position Sensitivity Power-up time* Step response time* Step response settling time* SM9233/SM9235/SM9236 SM9333/SM9336 Symbol IVDD3p3 IVDD5p0 IVDD3p3 IVDD5p0 Min Typ 3.3 3.9 3.3 3.9 Max 4.1 5 3.8 5 Units mA mA mA mA All OUTMIN -26,215 Counts All All All All SM9233 SM9235 SM9236 SM9333 SM9336 SM9233 SM9235 SM9236 SM9333 SM9336 All All From supply VDD > 3.0 V to output settled to 63% of final value Pressure step response; settled to 63% of final value OUTMAX +26,214 52,429 16 2000 ± 0.25 ± 0.2 ± 0.1 0.2 0.1 ± 0.5 ± 0.4 ± 0.3 ± 0.5 ± 0.3 20 0.1 Counts Counts Bits Hz %FS %FS %FS %FS %FS %FS Pressure step response; output settled to full total error band FS ACCAZ ACC BW SG -1.25 -1 -1 -1.25 -1 -2.75 -2.3 -1.25 -2.75 -1.5 1.25 1 1 1.25 1 2.75 2.3 1.25 2.75 1.5 %FS %FS %FS Hz %FS/g tUP 18 ms tRESP 18 ms tSETTLE 45 ms * Not tested in production Notes: e) f) g) h) Supply current given for continuous operation. Device can be set to sleep mode with significantly lower power consumption. Refer to section 11 for details. The total error band specification applies overall operating conditions in dry clean air. This specification includes the combination of linearity, repeatability, and hysteresis errors over pressure, temperature, and 3.3 V supply voltage. Based autozero calibration at 25 °C after board mount or solder reflow. Autozero can be performed by the user in user software by storing the offset reading at zero differential (or gage) pressure and subtracting this stored reference offset value from actual readings when in use.on system level autozero at 25 °C after board mount or solder reflow. Based on sample testing during initial product qualification, not tested in production TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 3 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series 7. I2C Interface Description SDA output low voltage* Low-to-High transition threshold* High-to-Low transition threshold* I2C clock frequency* Bus free time between a START and STOP condition* Clock low time* Clock high time* START condition hold time* Data setup time* Data hold time* Setup time for repeated START condition* Setup time for STOP condition* Rise time of SDA and SCL signals* Fall time of SDA and SCL signals* Condition ISDA = 3 mA pins SA0, SCL pins SA0, SCL Symbol VSDA,OL VSDA,LH VSDA,HL fSCL tBUSF tLO tHI tSH tSU tH tRSH tPSU tR tF Min 0 0.5 0.3 Typ 0.6 0.4 Max 0.4 0.7 0.5 400 1300 1300 600 100 100 0 600 600 300 300 Units V VDD VDD kHz ns ns ns ns ns ns ns ns ns ns * Not tested in production 8. Package Reference SOIC-16 (C) Vertical Package Dimensions Lot number identification on top side TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 4 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series SOIC-16 (C) Vertical Package Dimensions Lot number identification on top side Notes: • • • • • • • • • • All dimensions in units of [mm] Moisture Sensitivity Level (MSL): Level 3 Clean, dry air compatible with wetted materials. Wetted materials include : Wetted materials include silicon, glass, RTV (silicone), gold, aluminum, copper, epoxy and mold compound. Tolerance on all dimensions ±0.13 mm unless otherwise specified. [B] is tube connected to bottom side of sensor die. [T] is tube connected to top side of sensor die. Topside pressure is positive pressure. An increase in topside pressure will result in an increase in sensor output Bottom plate is stainless steel Electrically isolate the bottom metal cover, do not connect to the cover and keep the board underneath free from electrical circuits. Robust JEDEC SOIC-16 package for automated assembly Manufactured according to ISO9001 , ISO14001 and ISO/TS 16949 standards TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 5 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series Applications Circuit SM9233/SM9235/SM9236/SM9333/SM9336 Package Labeling Notes: • Pin No Pin Function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NC (No Connect) NC NC NC VSS VDD NC NC NC SDA SCL NC GND (ASIC Test Pin) NC NC NC Do not connect to NC pins TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 6 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series 9. Ordering Information (Standard Configurations) Part Number Pressure Range SM9233-BCE-S-250-000 0 to +250 Pa SM9235-BCE-S-300-000 0 to +300 Pa SM9235-BBE-S-300-000 0 to +300 Pa SM9236-BCE-S-600-000 0 to +600 Pa SM9233-BCE-S-250-002 0 to +250 Pa SM9235-BCE-S-300-002 0 to +300 Pa SM9236-BCE-S-600-002 0 to +600 Pa SM9333-BCE-S-125-000 -125 Pa to +125 Pa SM9336-BCE-S-250-000 -250 Pa to +250 Pa SM9333-BBE-S-125-000 -125 Pa to +125 Pa SM9333-BBE-S-250-000 -250 Pa to +250 Pa Notes: a) b) Voltage Shipping(a) Package Configuration Comment SOIC-16 Dual Vertical 3.3 V 5.0 V SOIC-16 Dual Horizontal Sticks (45 parts/stick) SOIC-16 Dual Vertical Bandwidth 20Hz (b) 3.3 V SOIC-16 Dual Horizontal All parts also available in shipping configuration Tape & Reel (SOIC-16 Dual Horizontal 500 parts/reel; SOIC-16 Dual Vertical 350 parts/reel), see section 10. Part Numbering Key for ordering information Contact us for bandwidths other than 20 Hz TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 7 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series 10. Part numbering key Part Number SM – XXXX XXX X XXX 0 0 0 Max Pressure Range 9 +125 to +600 Pa Counter Pressure Range Pressure Type 2 Gage 3 Differential Output Type 3 Shipping Format S Stick T Tape & Reel 16-bit I2C Compensated Temperature Range Total Error Band 3 3% FS (before Autozero) 5 2.5% FS (before Autozero) 6 1.5% FS (before Autozero) TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES E -20 to +85 °C Package Type and Porting BC SOIC-16 w/ dual vertical porting BB SOIC-16 w/ dual horizontal porting 08/2020 Page 8 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series 11. Typical Characteristics (SM9233/SM9235/SM9236) A solute A ura SM9 - Histogra 6 A solute A ura - Histogra Populatio Populatio SM9 A solute Total Error Ba d %FS A solute Total Error Ba d %FS Total Error Ba d Drift %FS Total Error Ba d Drift %FS Total Error Ba d %FS Populatio SM9 A solute A ura after Board ou t a d Autozero - Histogra TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 9 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series Total Error Ba d %FS 11. Typical Characteristics (SM9333/SM9336) * o o Zero pressure total error band tested at 30 C and 3.3V. Measured after HTOL (at 105 C and 5.5V) at 168, 500 and 1000 hrs. Not tested in production TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 10 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series 12. Functional Description 12.1 Overview The SM9000 series is a high precision, factory calibrated pressure sensor for ultra-low pressure measurements. It combines a low pressure MEMS die with a 16 bit ASIC, utilizing DSP for multi dimensional polynomial error correction. The calibrated pressure output data is available 2 via digital data interface (I C). Status information on the sensor integrity and unique serial number are accessible via this digital interface. 12.2 Global Sensor Parameters 12.2.1 Digital Pressure Transfer Function In general digital output data is available with a word length of 16 bit. The numeric representation is always as 2's complement, which results in a range of: 0 ... +32767 counts (positive range, or 0000h ... 7FFFh) -32768 ... -1 counts (negative range, or 8000h ... FFFFh) The pressure sensor device is calibrated in the end-of-line production test over the specified Pmin to Pmax pressure range (see Section 4). The output code at Pmin is nominally -26,215 and at Pmax it is nominally 26,214. This allows the sensor to still operate monotically outside its nominal range till the maximum (or minimum) counts are reached. An example for a 250 Gauge SM9233-BCE-S-250-000 is given in the graph below An example for a 250 differential SM9336-BCE-S-250-000 is given in the graph below TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 11 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series An example for a 250 differential SM9336-BCE-S-250-000 is given in the graph below Green: Total error band per specification Red and Blue: Outside specification, but expect monotonic behavior till maximum (or minimum) code is reached 12.2.2 Conversion from counts to pressure The digital output count gives a signed 16 bit value for pressure and to convert the count reading OUT read to actual calibrated pressure units pp-unit the following equation can be used ��− � =� � + � � with pmin, pmax, OUTmin and OUTmax as specified in sections 4 and 6. � � �� −� −� � � � �� −� � 12.2.4 Digital Temperature Transfer Function An internal temperature sensor measures the chip temperature. The temperature characteristic is linear and is described by the following equation: DT = b1 * TA + b0 The temperature transfer function parameters are as follows: Temperature Symbol TA,1 Temperature [°C] TA,2 Digital Output Value [counts ] -40 Symbol DT,OUT,1 125 DT,OUT,2 Sensitivity / Offset Value Unit -32768 Symbol b1 397.2 counts/°C 32767 b0 -16881 counts The typical temperature accuracy at 30 °C is within ± 2 °C. 12.3 Voltage Supply The device is supplied from pin VDD, typically 3.3 V, but it can operate as high as 5 V. From this supply input several internal voltage regulators are generating stabilized voltage levels for analog and digital circuit sections. The different internal voltages are monitored by power-OK diagnostic circuitry. Also a stabilized voltage for the resistive MEMS pressure sensor is derived from VDD. The digital data interface allows to set it into Sleep Mode using a specific command (Enter Sleep Mode), which confirms very low consumption (IVDD,SM) of typically less than 10 µA. Of course, in Sleep Mode no pressure data is acquired. TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 12 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series For the I2C command to send the sensor into Sleep Mode see 13.6. To wake-up the sensor to normal operation, the clock input SCL shall be toggled (a rising edge at SCL will wake-up the device). 12.4 Diagnosis Functions 12.4.1 MEMS Sensor Bridge Diagnostics Internal errors of the MEMS pressure sensor are detected and the STATUS registers can be read via the digital I 2C interface. Bridge Diagnostics An integrated bridge diagnostic circuit supervises the resistive pressure sensor to detect any of the faults as follows:  Sensor faults:  Short of any of the four bridge resistors of the pressure sensor  Interruption of any of the four of bridge resistors  Wiring faults:  Open connection of any of the bridge supply or signals  Wrong connection of any sensor bridge terminal to either ground or bridge supply The MEMS sensor bridge diagnostics are active permanently (true background diagnostics) and in case of an error the bridge check fail event is indicated by setting the bit bc_fail in the internal STATUS register. Bridge Supply Diagnostics Another diagnostic function checks if the supply to the sensor bridge is in its specified range. Here, in case of a supply error the bit bs_fail in the STATUS register will be set. 12.4.2 Configuration Memory Check The integrity of data stored in the embedded NVM used as the configuration memory (calibration parameters, device configuration, device ID, etc.) is checked at power-up of the component by calculation of a check sum (CRC). If a check sum error is detected no reliable pressure calculation is possible. Therefore, the sensor remains in idle state, i.e. no pressure data transferred to the output registers DSP_T and DSP_S. In this case the bits STATUS.dsp_s_up and dsp_t_up will never be set. 12.5 I2C Interface The SM9xxx features an I2C slave interface. This interface provides direct access to registers of the memory of the SM9xxx sensor. An external I2C master (e.g. a microcontroller) can read from and write to memory addresses (registers) of the device using the following commands: • • • Random write: Sets a memory address and writes data to consecutive memory addresses of the device starting at the set memory address. Random read: Sets a memory address and reads data from consecutive memory addresses of the device starting at the set memory address. Read last: Reads data from the device starting at the last memory address set by the master. This facilitates repeated reading of the same memory addresses without transmitting a memory address first. All reads/writes must start at word aligned addresses (i.e. LSB of memory address equals 0) and read/write an even number of bytes. TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 13 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series I2C Interface Timing Diagram: 12.5.1 I2C Command Format The SM9x3x-Sensor uses a standard 7-bit I2C slave address field. The LSB of the slave address specifies the frame type used to perform read and write operations. For LSB = 0 the protocol is compatible to standard I2C EEPROMs, for LSB = 1 the protocol is extended by a CRC protection. Thus, each device occupies two I2C addresses: even addresses are for standard EEPROM compatible protocols and odd addresses are for CRC protected protocols. Unprotected and CRC protected frames can be interleaved. The two different frame types - standard EEPROM (without CRC) or CRC protected - are shown in the next two figures. I2C Read / Write Commands - Standard EEPROM compatible protocol TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 14 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series I2C Read / Write Commands - CRC protected protocol The memory address field sets the byte address of the first memory location to be read from or written to. Only 16-bit-word aligned reads/writes are supported, i.e. the LSB of memory address has to be zero always. The read/write data is transferred MSB first, low byte before high byte. The length field (bits[7:4]) required for CRC protected frames specifies the number of data bytes to be transferred decremented by one, i.e. a value of 0001b corresponds to two bytes. All frames must transfer an even number of bytes. The maximum length for CRC protected read/write frames is 16/4 bytes. For unprotected frames the length is unlimited. The CRC4 and CRC8 for redundancy check are computed in the same bit and byte order as the transmission over the bus. The polynomials employed are: • • CRC4: polynomial 0x03; initialization value: 0x0F CRC8: polynomial 0xD5; initialization value: 0xFF If a CRC errors occurs, then the event bit com_crc_error in the STATUS register will be set. 12.5.2 I2C Command Examples For all examples below the 7-bit device slave address used is 0x6C for unprotected commands, and 0x6D for CRC protected commands, respectively. The command sequence following describes an unprotected Read command (without CRC) of 3 subsequent 16-bit words starting at memory address 0x2E to read the corrected IC temperature, corrected pressure signal, and (synchronized) status bits of the sensor. Random Read: Byte # 0 1 2 SBM (sent by master) 3 4 5 6 7 8 0xD8 0x2E 0xD9 SBM comment slave address 6C + LSB = 0 for Write memory address slave address 6C + LSB = 1 for Read SBS (sent by sensor) 0xF2 0x7D 0xEA 0x82 0x1E 0x00 SBS comment DSP_T (Lo-Byte) ad. 0x2E DSP_T (Hi-Byte) DSP_S (Lo-Byte) ad. 0x30 DSP_S (Hi-Byte) sync‘ed Status (b7 - b0) ad. 0x32 sync‘ed Status (b15 - b8) TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 15 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series The following sequence writes one 16-bit word to address 0x22. This will copy 0x6C32 into the command register CMD to move the component to Sleep Mode. Random Write: Byte # 0 1 2 3 SBM (sent by master) 0xD8 0x22 0x32 0x6C SBM comment slave address 6C + LSB = 0 for Write memory address Lo-Byte written to CMD[7:0] Hi-Byte written to CMD[15:8] SBS (sent by sensor) SBS comment The next command sequence describes a CRC protected Read command of 3 subsequent 16-bit words starting at memory address 0x2E. Random Read - protected by CRC: Byte # 0 1 2 3 SBM (sent by master) 4 5 6 7 8 9 10 0xDA 0x2E 0x5B 0xDB SBM comment slave address 6D + LSB = 0 for Write memory address 3: length = 4Byte B: CRC4 slave address 6D + LSB = 1 for Read SBS (sent by sensor) 0xF2 0x7D 0xEA 0x82 0x1E 0x00 0x65 SBS comment DSP_T (LoByte) ad. 0x2E DSP_T (HiByte) DSP_S (LoByte) ad. 0x30 DSP_S (HiByte) sync‘ed Status (b7 - b0) ad. 0x32 sync‘ed Status (b15 b8) CRC8 (calc'd) The next example describes a Write of one 16-bit word (contents 0xCF9E) with CRC protection to address 0x36 to clear events in the STATUS register. Random Write - protected with CRC: Byte # 0 1 2 3 4 5 SBM (sent by master) 0xDA 0x36 0x16 0x9E 0xCF 0xA1 SBM comment slave address 6D + LSB = 0 for Write memory address 1: length = 2Byte 6: CRC4 STATUS (Lo-Byte) ad. 0x36 STATUS (Hi-Byte) CRC8 (calculated) SBS (sent by sensor) SBS comment TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 16 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series 12.6 Register Descriptions Register Read or Write are performed via the digital communication interface. After power-up of the IC all registers except STATUS and CMD are write protected. Command register: 0x22 CMD bits name default rw description Writing to this register controls the state of the SM9x3x device. 15:0 cmd 0 0x6C32: SLEEP Mode Initiate the power state SLEEP, powering down the ASIC w 0xB169: RESET Performs a reset. After reset the power-up sequence will be executed, i.e. the registers are loaded with data from the configuration memory, also a CRC check is performed. Temperature register: 0x2E DSP_T bits name 15:0 dsp_t default rw description Corrected temperature measurement value of the sensor. Whenever this register is updated with a new measurement the STATUS.dsp_t_up event bit is set. r Pressure register: 0x30 DSP_S bits name 15:0 dsp_s default rw r description Corrected pressure measurement value of the sensor. Whenever this register is updated with a new measurement the STATUS.dsp_s_up event bit is set. The registers DSP_T and DSP_S contain invalid data after power-up until the first temperature and pressure values have been measured by the device and transferred to these registers. In case a NVM CRC error occurred, the DSP_T and DSP_S registers would never be updated. Thus, after power up it is necessary to wait until the STATUS.dsp_s_up and dsp_t_up bits have been set at least once before using the temperature or pressure data. It is not sufficient to wait just for a fixed time delay. Status register - synchronized: 0x32 STATUS_SYNC bits 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 name idle - reserved - reserved dsp_s_up dsp_t_up - reserved - reserved bs_fail bc_fail - reserved dsp_sat com_crc_error - reserved - reserved dsp_s_missed dsp_t_missed default 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw type status event event event event status status event event event status event status status event event description STATUS.idle reserved reserved when DSP_S is read STATUS.dsp_s_up is copied here when DSP_T is read STATUS.dsp_t_up is copied here reserved reserved STATUS.bs_fail STATUS.bc_fail reserved STATUS.dsp_sat STATUS.com_crc_error reserved reserved STATUS.dsp_s_missed STATUS.dsp_t_missed TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 17 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series The bits STATUS_SYNC[15:5,0] are identical to the bits STATUS[15:5,0]. The bits STATUS_SYNC[4:3] are copied from the STATUS register when the corresponding DSP registers are read. First reading the DSP registers and then STATUS_SYNC confirms that both values are consistent to each other. The synchronized status STATUS_SYNC register can be used to continuously poll the pressure, temperature and status of the device with a single read command by reading three 16 bit words starting at address 0x2E. By evaluating STATUS_SYNC.dsp_t_up and STATUS_SYNC.dsp_s_up it can be determined if the values in DSP_T and DSP_S acquired during the same read contain recently updated temperature or pressure values. Status register: 0x36 STATUS bits name default rw type1 0 idle 0 rw status 1 2 - reserved - reserved - 0 0 rw rw event event 3 dsp_s_up 0 rw event 4 dsp_t_up 0 rw event 5 6 7 8 9 - reserved - reserved bs_fail bc_fail - reserved - 0 0 0 0 0 rw rw rw rw rw status status event event event 10 dsp_sat 0 rw status 11 12 13 14 15 com_crc_error - reserved - reserved - 0 0 0 0 0 rw rw rw rw rw event status status • • dsp_s_missed dsp_t_missed event event description 0: chip in busy state 1: chip in idle state reserved reserved 1: DSP_S register has been updated. Cleared when DSP_S is read 1: DSP_T register has been updated. Cleared when DSP_T is read. reserved reserved 1: bridge supply failure occurred 1: sensor bridge check failure occurred reserved 1:a DSP computataion leading to current DSP_T or DSP_S values was saturated to prevent overflow 1:communication CRC error reserved reserved 1:dsp_s_up was 1 when DSP_S updated 1:dsp_t_up was 1 when DSP_T updated "Event" type flags remain set until cleared by writing '1' to the respective bit position in STATUS register (not STATUS_SYNC). Writing 0xFFFF to the STATUS register will clear all event bits. "Status" type flag represents a condition of a hardware module of the IC and persists until the condition has disappeared. Serial Number register 0: 0x50 SER0 bits 15:0 name ser0 default rw r description Serial number of the IC, Lo-Word Serial Number register 1: 0x52 SER1 bits 15:0 name ser1 default rw r description Serial number of the IC, Hi-Word TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 18 ULTRA-LOW PRESSURE DIGITAL SENSOR SM9233/SM9235/SM9236/SM9333/SM9336 Series 13. Qualification Standards REACH Compliant RoHS Compliant PFOS/PFOA Compliant For qualification specifications GLOBAL Tel +1 408 577 0100 customercare.mlpt@te.com te.com/sensors TE Connectivity, TE, 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 only, 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. © 2020 TE Connectivity Corporation. All Rights Reserved. Version 08/2020 TE CONNECTIVITY SENSORS /// SM9233/SM9235/SM9236/SM9333/SM9336 SERIES 08/2020 Page 19