User's Manual

M10 User Manual
Contents
Contents ........................................................................................................................... 1
0. Revision history ............................................................................................................. 4
1. Introduction ................................................................................................................... 5
1.1. Reference ............................................................................................................. 5
2. Product Concept............................................................................................................. 6
3. Placement...................................................................................................................... 8
3.1. Pin Assignment ..................................................................................................... 8
3.2. Placement recommendation................................................................................... 15
3.3. Placement clearance ............................................................................................. 15
4. Digital I/O Connection .................................................................................................. 17
5. VDD_EXT Pin ............................................................................................................ 18
6. Serial Interface and Debug Interface ............................................................................... 19
7. SIM Card .................................................................................................................... 20
8. SLEEP Mode ............................................................................................................... 21
9. Audio Trace................................................................................................................. 22
10. RF Design Guide ........................................................................................................ 23
10.1. Recommended Impedance Matching Circuit.......................................................... 23
10.2. Matched RF Transmission Line Design................................................................. 24
10.3. PCB Layout Consideration .................................................................................. 24
11. The Recommended Ramp-soak-spike Reflow Profile ...................................................... 28