Table of Figures
Figure 2-1 Top view of the M590 module ............................................................................................... 3
Figure 2-2 PCB foot print recommended for M590 (unit: mm) .............................................................. 6
Figure 3-1 Current peaks and voltage drops ............................................................................................ 7
Figure 3-2 Capacitors used for the power supply .................................................................................... 8
Figure 3-3 Reference design of power supply control ............................................................................. 8
Figure 3-4 Reference design of power supply controlled by p-MOSFET ............................................... 9
Figure 3-5 Reference designs of separated power supply ...................................................................... 10
Figure 3-6 Power-on procedure ............................................................................................................. 11
Figure 3-7 Power-off procedure ............................................................................................................. 11
Figure 3-8 Reference circuit for power-on/off control ........................................................................... 12
Figure 3-9 Reference circuit for power-on/off controlled by high level ................................................ 12
Figure 3-10 Reset circuit with triode separating .................................................................................... 13
Figure 3-11 Signal connection between DCE and DTE ......................................................................... 13
Figure 3-12 Recommended circuit for the communication between 3.3V MCU and UART ................ 14
Figure 3-13 Recommended circuit for the communication between 5V MCU and UART ................... 14
Figure 3-14 RING indicator for incoming call ...................................................................................... 16
Figure 3-15 RING indicator for SMS .................................................................................................... 16
Figure 3-16 Reference design of SIM card interface ............................................................................. 17
Figure 3-17 Reference of SIM card socket ............................................................................................ 17
Figure 3-18 LED indicator ..................................................................................................................... 18
Figure 3-19 Reference design for antenna interface .............................................................................. 19
Figure 3-20 RF layout reference ............................................................................................................ 20
Figure 3-21 Reference RF design when pin 21 is not used .................................................................... 20
Figure 3-22 Encapsulation specifications of Murata RF connector ....................................................... 21
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