Manuale UtenteSommarioOVERVIEW6Document Objectives6Reference Documents6Document Modifications6Conventions62. Block Diagram73. Functional Integration8How to connect a SIM card9Connect Audio10PCM Digital Audio10Analog Audio133.2.2.1 Microphone Note133.2.2.2 Note for Speaker133.2.2.3 Recommended Microphone Characteristics143.2.2.4 Recommended Speaker Characteristics16PWM16PWM for Buzzer connection16Network LED16Power Requirements17UART17Complete V24—Connection HiLo3G -host18Complete V24 Interface with PC19Partial V24 (RX-TX-RTS-CTS)—Connection HiLo3G -host20Partial V24 (RX-TX)—Connection HiLo3G -host21GPIO22ADC22Backup Battery23Backup Battery Function Feature23Charge by Internal HiLo3G Charging Function23Backup Battery Technology233.8.3.1 Capacitor Battery23USB244. Power Management24Power Modes24Module Power up24PWON Power up244.2.1.1 IO DC Presence before Power on25Power on and Sleep Diagrams26Module Power off28UART Interface28USB Interface28Sleep Mode285. ESD & EMC Recommendation29Handling HiLo3G29ESD Recommendations29Avoid ESD29EMC recommendations296. Radio Integration30Antenna Connection30Antenna Connector30Spring Contact30Antenna Notice31Ground Link Area31Layout32Mechanical Surrounding32Other Recommendation—test for production/design327. Audio Integration32Mechanical integration and acoustics32Electronics and layout338. Recommendations on layout of customer‘s board33General recommendations on layout33Ground338.1.1.1 Ground layout guidelines338.1.1.2 Digital ground338.1.1.3 Analog/RF ground33Power supplies34Clocks34Data bus and other signals34Radio34Audio34Shielding35Example of layout for customer‘s board359. Label36Figure 1: HiLo3G module Block diagram7Figure 2: HiLo3G module connector side8Figure 3: HiLo3G module back side8Figure 4: SIM Card signals9Figure 5: EMC and ESD protection components close to SIM9Figure 6: Serial resistors for protection of long SIM bus lines10Figure 7: Primary PCM mode timing parameter11Figure 8: Auxiliary PCM mode timing parameter12Figure 9: Analog audio connections13Figure 10: Filter and ESD protection for microphone13Figure 11: Filter and ESD protection for 32 ohms speaker14Figure 12: Example of D class TPA2010D1 1Watt audio amplifier connections14Figure 13: Microphone performance requirements15Figure 14: Speaker performance requirements16Figure 15: Buzzer connection16Figure 16: Network LED connection17Figure 17: Complete V24 connection between the HiLo3G and the host18Figure 18: C19Figure 19: Connection to a data cable19Figure 20: Partial V24 connection (4 wires) between HiLo3G and host20Figure 21: Partial V24 connection (2 wires) between HiLo3G and host21Figure 22: Programmable GPIO configurations22Figure 23: Backup battery or 10μF capacitor internally charged23Figure 24: Power on sequence25Figure 25: Power off sequence25Figure 26: Diagram for the power on26Figure 27: Diagram for the sleep mode27Figure 28: Power off sequence for PWON, VGPIO and CTS28Figure 29: Antenna connection reference30Figure 30: Spring contact reference30Figure 31: Ground HiLo3G to customer board31Figure 32: Layout of audio differential signals on a layer n34Figure 33: Adjacent layers of audio differential signals34Figure 34: Reference 6 layers PCB stack35Dimensioni: 1,16 MBPagine: 38Language: EnglishApri il manuale