TI Single Mode v4.0 8051 8kB 17.9mA / 18.2mA to 14.7mA / 14.3mA 24uA / 6.8uA Texas Instruments CC256x Dual Mode Classic + No - External None None - - Texas Instruments CC26xx Single Mode BLE v4.1 Cortex[c10] 128kB 20kB 5.9mA - Nordic Semiconductor nRF51822 Single Mode v4.1 / ANT Cortex-M0 128kB / 256kB 16kB / 32kB 9.7mA / 8mA 15.5uA / 5.6uA Nordic Semiconductor nRF8001 Single Mode v4.0 None None None - Dialog Semiconductor DA14580 Single Mode BLE v4.1 Cortex-M0 32kB OTP 42kB + 8kB 4.9mA / 4.9mA - Cypress Semiconductor PSoC 4 BLE / PRoC BLE Single Mode BLE v4.1 Cortex-M0 128kB / 256kB 16kB / 32kB 15.6mA / 16.4mA 18.9uA / 6.2uA CSR CSR101x Single Mode BLE v4.1 16-bit RISC 64kB 64kB 16mA 28uA / 10.8uA 3.3.5.4 – Antennas A vital component of a wireless communication system is the antenna. The antenna is used to transmit the information and with an improperly manufactured antenna, there will be no communication. The design of the antenna and the RF layout is vital since this is how the devices are able to communicate. The antenna design, the layout and enclosure is what determines the range of the device. If 41
2 nH inductor BLE/MCU L9, L6 2 3 nH inductor BLE/MCU L8 1 32.768-kHz CRYSTAL OSCILLATOR BLE/MCU Q3 1 32-MHz CRYSTAL OSCILLATOR BLE/MCU Q4 1 CC2450 2.4-GHz Bluetooth low energy System-on-Chip BLE/MCU IC1 1 ANTENNA CHIP 2.4GHZ BLE/MCU A1 1 3.6 V Coin Battery Power MGMT B1 1 4.7 uF capacitor Power MGMT C1, C2 2 470-ohm resistor Power MGMT R1 1 8.2-kohm resistor Power MGMT R2 1 IC Controller Li-ion Power MGMT G1 1 CONN USB MICRO B RECPT Power MGMT 1 Red LED Power MGMT D4 1 Battery holder Power MGMT H1 1 Step Down Converter with Bypass Mode Buck Converter 1 Ferrite Bead 1000-ohms @ 100 MHz Buck Converter LBEAD 1 Table Bill of Materials and Parts Acquisition Component Subsystem System Reference Quantity 2.2 uF capacitor Buck Converter C3, C4, C301, C5 4 1 uF capacitor Buck Converter C6 1 100 nF capacitor Buck Converter C7, C8, C9, C10, C11 5 2.2 nH inductor Buck Converter L1 1
Table MCU System Test MCU System Test Step Procedure Expected Results Observations 5. Measure the current draw Current draw measures around 235 micro amps. 6. Press button 1 of the MCU The MCU come out of low power mode 1. LED1 flashes and the MCU enters low power mode 2. 7. Measure the current draw. Current reading measures at around 0.9 micro amps. 8. Press button 1 of the MCU. The MCU enters active mode and flashes LED1 9. Measure and write down the voltage at BattMon pin. Testing MCU battery monitoring. Voltage measurement is around half the battery voltage. 10. Press Button1 of the MCU. Count the number of times the LED flashes. The number of times the LED flashes represents the ones place of the voltage measured in step 9. If the voltage measure at the BattMon pin was 2.35, the LED flashes two times. 11. Press Button1 of the MCU. Count the number of times the LED flashes. The number of times the LED flashes represents the tenths place of the voltage measured in step 9. If the voltage measure at the BattMon pin was 2.35, the LED flashes three times.
Table Hardware Integration Test (continued) Hardware Integration Test Step Procedure Expected Results Observations 8. Measure the supply voltage to the MCU Supply voltage to the MCU reads about 2.1 volts. 9. Press button 1 of the MCU. Monitor the supply voltage to the MCU throughout the duration of the LED being on. The LED comes on and stays on. The supply voltage to the MCU is about 2.1 volts until the battery reached about 2.2 volts. At this point the TSP62730 switches to automatic bypass mode and the voltage supplied to the MCU is about the same as the battery voltage. 10. Connect the micro USB to the charging port. Charging LED comes on and the MCU enters bypass mode again. 11. Measure the MCU supply voltage. Voltage supplied to the MCU is about 2.1 V 12. Press button 1 of the MCU The LED turns off and the MCU enters the section of the test to test battery charging. 13. Let the battery charge for about 30 minutes. The battery voltage increases from 2.1 to above 3 volts
to the home page and Tracker 1 appears on this page. Table System Integration Test(continued) System Integration Test Step Procedure Expected Results Observations 5. Verify the battery status for Tracker 1 is green. Battery indicator shows green for Tracker 1 in the application. 6. Remove the battery from Tracker 1. Battery status becomes grey for unknown. 7. On the application, select the tracker 1 find me button. The application shows “Tracker is not within range. The map will show the last location where the item was within range” message. A map appears with a marker indicating the last position the trackers was successfully communicated with. 8. Install the battery back into tracker 1. Battery indicator shows green for Tracker 1 in the application. 9. On the application, select the tracker 1 find me button. The application displays message “Finding tracker 1”. Tracker1’s buzzer begins to ring and the LED flashes. 10. On Tracker1, press button. Tracker 1 stops the ringing and the blinking of the LED
APPENDIX Appendix A – References and Works Cited # References 1 Digikeycom. (2016). Digikeycom. Retrieved 1 July, 2016, from technologies 2 Argenoxcom. (2016). Argenoxcom. Retrieved 29 July, 2016, from 3 Cypresscom. (2016). Cypresscom. Retrieved 29 July, 2016, from 4 Wwwticom. (2016). Wwwticom. Retrieved 29 July, 2016, from 5 Wwwticom. (2016). Wwwticom. Retrieved 10 July, 2016, from In-text citation: (Wwwticom, 2016) 6 Wwwticom. (2016). Wwwticom. Retrieved 1 July, 2016, from http://www.ti.com/lit/an/snva533/snva533.pdf In-text citation: (Wwwticom, 2016)