Electronic Components Datasheet Search |
|
STSC1 Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers |
|
STSC1 Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers |
5 / 13 page www.sensirion.com Version 1 – May 2014 4/13 Figure 3 Timing diagram for digital input/output pads. SDA directions are seen from the sensor. Bold SDA lines are controlled by the sensor, plain SDA lines are controlled by the micro-controller. Note that SDA valid read time is triggered by falling edge of preceding toggle. 5 Interface Specifications The STSC1 supports I2C fast mode (SCL clock frequency from 0 to 400 kHz) with clock stretching. For detailed information on the I2C protocol, refer to NXP I2C-bus specification and user manual UM10204, Rev. 4, February 13, 2012: http://ics.nxp.com/support/documents/interface/pdf/I2C.bu s.specification.pdf The STSC1 comes in a 4-pin package – see Table 6. Pin Name Comments 1 VDD Supply voltage 2 SCL Serial clock, bidirectional 3 SDA Serial data, bidirectional 4 VSS Ground Table 6 STSC1 pin assignment (top view). The center pad is internally connected to VSS. Power-supply pins supply voltage (VDD) and ground (VSS) must be decoupled with a 100 nF capacitor that shall be placed as close to the sensor as possible – see Figure 4. SCL is used to synchronize the communication between microcontroller and the sensor. The master must keep the clock frequency within 0 to 400 kHz as specified in Table 5. The STSC1 may pull down the SCL line when clock stretching is enabled. The SDA pin is used to transfer data in and out of the sensor. For safe communication, the timing specifications defined in the I2C manual must be met. To avoid signal contention, the microcontroller must only drive SDA and SCL low. External pull-up resistors (e.g. 10 kΩ) are required to pull the signal high. For dimensioning resistor sizes please take bus capacity requirements into account. It should be noted that pull-up resistors may be included in I/O circuits of microcontrollers. Figure 4 Typical application circuit, including pull-up resistors RP and decoupling of VDD and VSS by a capacitor. For good performance of the STSC1 in the application, it is important to know that the center pad of the STSC1 offers the best thermal contact to the temperature sensor. For more information on design-in, please refer to the document “SHTxx Design Guide”. For mechanical reasons the center pad should be soldered. Electrically, the center pad is internally connected to GND and may be connected to the GND net on the PCB or left floating. 6 Operation and Communication All commands and memory locations of the STSC1 are mapped to a 16-bit address space which can be accessed via the I2C protocol. STSC1 Bin. Dec. Hex. I2C address 100’1010 74 0x4A Table 7 STSC1 I2C device address. SCL 70% 30% tLOW 1/fSCL tHIGH tR tF SDA 70% 30% tSU;DAT tHD;DAT DATA IN tR SDA 70% 30% DATA OUT tVD;DAT tF 2 1 3 4 STSC1 AXY89 SDA SCL GND VDD MCU (master) R P R P SCL OUT SDA OUT SDA IN SCL IN STSC1 (slave) |
Similar Part No. - STSC1 |
|
Similar Description - STSC1 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |