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Sierra Wireless
WISMO218
Manuale Utente
Sierra Wireless WISMO218 Manuale Utente
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WA_DEV_W218_PTS_002
Rev 005
Page 12 of 109
Product Technical Specification &
Customer Design Guidelines
List of Figures
Figure 1.
Functional Architecture ....................................................................................................... 22
Figure 2.
Power Supply During Burst Emission ................................................................................ 25
Figure 3.
Reject Filter Diagram ........................................................................................................... 26
Figure 4.
SPI Timing Diagrams ........................................................................................................... 35
Figure 5.
Example of an SPI to UART2 Interface Conversion Implementation .............................. 36
Figure 6.
Example of RS-232 Level Shifter Implementation for UART2 .......................................... 37
Figure 7.
Example of RS-232 Level Shifter Implementation for UART ............................................ 40
Figure 8.
Example of V24/CMOS Serial Link Implementation for 2-wire UART ............................. 41
Figure 9.
Example of V24/CMOS Serial Link Implementation for 4-wire UART ............................. 41
Figure 10.
Example of V24/CMOS Serial Link Implementation for 5-wire UART ............................. 42
Figure 11.
Example of Full Modem V24/CMOS Serial Link Implementation for full-UART ............. 42
Figure 12.
Example of SIM Socket Implementation............................................................................ 46
Figure 13.
DC and AC Equivalent Circuits of MIC ............................................................................... 49
Figure 14.
Equivalent Circuit for SPK ................................................................................................... 51
Figure 15.
Example of MIC Input Differential Connection with LC Filter .......................................... 52
Figure 16.
Example of MIC Input Differential Connection without LC Filter .................................... 53
Figure 17.
Example of MIC Input Single-Ended connection with LC Filter ....................................... 54
Figure 18.
Example of MIC Input Single-Ended Connection without LC Filter ................................. 55
Figure 19.
Example of Speaker Differential Connection ..................................................................... 56
Figure 20.
Example of Speaker Single-Ended Connection ................................................................. 56
Figure 21.
Microphone ........................................................................................................................... 57
Figure 22.
Audio Track Design .............................................................................................................. 60
Figure 23.
Differential Audio Connection............................................................................................. 60
Figure 24.
Single-Ended Audio Connection ......................................................................................... 61
Figure 25.
Relative Timing for the PWM Output ................................................................................. 62
Figure 26.
Example of a LED Driven by the PWM0 or PWM1 Output ................................................ 63
Figure 27.
BUZZER Output .................................................................................................................... 64
Figure 28.
Example of Buzzer Implementation .................................................................................... 65
Figure 29.
Example of LED Driven by the BUZZER Output ................................................................ 66
Figure 30.
Example of the ON/~OFF Pin Connection Either By a Switch or Via an Open Collector
Transistor 68
Figure 31.
Power-ON Sequence (no PIN code activated) ................................................................... 68
Figure 32.
Power-OFF Sequence........................................................................................................... 70
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