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Sierra Wireless WISMO218 Electrical Information for Digital I/O

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WA_DEV_W218_PTS_002 Rev 005 Page 34 of 109

Product Technical Specification &

Customer Design Guidelines

Electrical Information for Digital I/O

The I/Os concerned are all interfaces such as GPIOs, SPIs, etc.

Table 5. Electrical Characteristics of Digital I/O

2.8 Volts T ype ( 2V8 )

Parameter

I/O type

Minim.

Typ

Maxim.

Condition

Internal 2.8V power supply

VCC_2V8

2.7V

2.8V

2.95V

Input / Output pin

VIL

CMOS

-0.4V*

0.4V

VIH

CMOS

2.4V

VCC_2V8 +

0.4V

VOL

CMOS

0.1V

VOH

CMOS

2.7V

2.4V

IOH = 4mA

* Absolute maximum ratings

Contents

Main Important Notice Safety and Hazards Limitations of Liability Copyright Trademarks Product Technical Specification & Customer Design Guidelines Contact Information Document Update History Page Page Contents Page 4. CONSUMPTION MEASUREMENT PROCEDURE ............................................ 83 Page Page List of Figures Page List of Tables Page 1. References Reference Documents Sierra Wireless Reference Documentation List of Abbreviations Page Page Page 2. General Description General Information Overall Dimensions Environment and Mechanics GSM/GPRS Features Firmware Connection Interfaces Functional Description WISMO218 core ARM RF Functionalities Baseband Functionalities 3. Interfaces General Interfaces Power Supply Power Supply Description Product Technical Specification & Customer Design Guidelines Electrical Characteristics Pin Description Application Filter WISMO218 Supply source L1 C1 C2 Page Power Consumption Various Operating Modes Product Technical Specification & Customer Design Guidelines Power Consumption Consumption Waveform Samples Page Page Recommendations for Less Consumption Product Technical Specification & Customer Design Guidelines Electrical Information for Digital I/O The I/Os concerned are all interfaces such as GPIOs, SPIs, etc. SPI Bus for Debug Trace ONLY Page Page Main Serial Link (UART) Page Page Product Technical Specification & Customer Design Guidelines V24/CMOS possible design Customer application ( DTE ) WISMO218 ( DCE ) Customer application ( DTE ) WISMO218 ( DCE ) WA_DEV_W218_PTS_002 Rev 005 Page 42 of 109 Product Technical Specification & Customer Design Guidelines Customer application ( DTE ) WISMO218 ( DCE ) Figure 10. Example of V24/CMOS Serial Link Implementatio n for 5-wire UART Customer application ( DTE ) WISMO218 ( DCE ) Page SIM Interface Page Product Technical Specification & Customer Design Guidelines SIM socket connection General Purpose Input/Output Product Technical Specification & Customer Design Guidelines Analog to Digital Converter Recommended ESD protection: AVL5M02200 from Amotech. The AUX-ADC0 input can be used for customer applications. Analog Audio Interface Microphone Features Do cu me nt Titl e Do cu me nt Titl Product Technical Specification & Customer Design Guidelines Speaker Features SPKP WISMO218 SPKN Page Page Page Page SPKP SPKN + Design Recommendation CM Page Page Page Page Product Technical Specification & Customer Design Guidelines Pulse-Width Modulators (PWMs) Page Product Technical Specification & Customer Design Guidelines BUZZER Output Page Page ON/~OFF Signal GND Switch ON/~OFF Page Page WISMO_READY Indication VCC_2V8 output BAT-RTC (Backup Battery) Page Page TX_CTRL Signal for TX Burst Indication Page Product Technical Specification & Customer Design Guidelines Reset Feature The ~RESET signal has a 100K internal pull up resistor to VCC_2V8. Pin Description GND Push button ~RESET Rohm DTC144EE GND ~RESET Reset command RF Interface RF Connection RF Performances Antenna Specifications Page Page 4. Consumption Measurement Procedure Hardware Configuration Equipment Page WISMO218 Development Kit Socket-Up Board Used SIM Cards Used Software Configurations WISMO218 Configuration Equipment Configuration Product Technical Specification & Customer Design Guidelines Template 5. Technical Specifications Castellation Connector Pin Configuration Castellation Pin Pin-Out Description Page Product Technical Specification & Customer Design Guidelines Recommended Connection When Not Used The table below gives the recommended connection for any unused pins. PCB Specification for Application Board Environmental Specifications Function Status Classification Page Mechanical Specifications Physical Characteristics WISMO218 Dimensions Page Recommended PCB Landing Pattern 6. Peripheral Devices References General Purpose Connector SIM Card Reader Microphone Speaker GSM Antenna 7. Noises and Design EMC Recommendations Power Supply 8. Appendix Standards and Recommendations Product Technical Specification & Customer Design Guidelines Page Safety Recommendations (for Information Only) RF Safety General Safety