User's Manual

Application Note [Page 2]
Design Considerations of EMW3239
Content
User Manual of EMW3239 ................................................................................................................................................ 1
Version Record .................................................................................................................................................................... 1
1. Introduction ................................................................................................................................................................. 4
2. Considerations in Hardware Design ......................................................................................................................... 6
MECHANICAL SIZE ............................................................................................................................................ 6 2.1
REFERENCE PACKAGE DESIGN .......................................................................................................................... 6 2.2
DC POWER DESIGN .......................................................................................................................................... 7 2.3
PIN FUNCTION .................................................................................................................................................. 7 2.4
RF DESIGN ....................................................................................................................................................... 9 2.5
2.5.1 On-board PCB Antenna Design ........................................................................................................... 9
2.5.2 External Antenna ............................................................................................................................... 10
ESD DESIGN ................................................................................................................................................... 11 2.6
3. Downloading Firmware and Storage Test Method ................................................................................................ 12
PREPARATIONS ................................................................................................................................................ 12 3.1
SWITCH SET UP IN DOWNLOADING MODE ....................................................................................................... 12 3.2
SYSTEM CONNECTION .................................................................................................................................... 13 3.3
SERIAL PORT SELECTION ................................................................................................................................ 13 3.4
J-FLASH .......................................................................................................................................................... 13 3.5
J-FLASH SET UP .............................................................................................................................................. 14 3.6
TESTING.......................................................................................................................................................... 15 3.7
3.7.1 Environment Set Up .......................................................................................................................... 15
IMPORTANT STATEMENT ................................................................................................................................. 16 3.8
4. SMT ........................................................................................................................................................................... 17
STENCILS ........................................................................................................................................................ 17 4.1
TEMPERATURE CURVE OF SECONDARY REFLOW ............................................................................................. 17 4.2
5. Mass Production Test and Product Update ............................................................................................................ 18
MODULE TEST ................................................................................................................................................ 18 5.1
5.1.1 Half Secondary Development of Firmware ....................................................................................... 18
5.1.2 Complete Secondary Development of Firmware .............................................................................. 18
PRODUCT UPDATE .......................................................................................................................................... 18 5.2
6. Technical Support ..................................................................................................................................................... 19
7. FCC Statement .......................................................................................................................................................... 20
Figure Content
Figure 1.1 Top View of EMW3239-P .................................................................................................................. 4
Figure 1.2 Top View of EMW3239-E .................................................................................................................. 4
Figure 2.1 Top View of Mechanical Size ............................................................................................................. 6
Figure 2.2 Side View of Mechanical Size ............................................................................................................ 6