Sierra Wireless AIRPRIME WISMO218 - Manual (Page 80)

WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 80
Product Technical Specification &
Customer Design Guidelines Consumption Measurement Procedure
Device Manufacturer Reference Notes
Stand alone power
supply
Metrix AX502 Used for VBAT (for boards peripherals)
4.1.2. AirPrime WS Series Development Kit
The AirPrime WS Series Development Kit is used as a basis for the AirPrime WISMO218
measurement via an adaptor board. The AirPrime WS Series Development Kit can be used to
perform consumption measurement using several settings. For the list and corresponding description
of the settings, see document [3] AirPrime WS Series Development Kit User Guide and document [1]
AirPrime WISMO218 Hardware Presentation.
The AirPrime WS Series Development Kit can be replaced by AirPrime Development Kit WMP100
once a suitable socket-up board is available.
The AirPrime WISMO218 is only powered by VBATT. The AirPrime WS Series Development Kit
board is powered by the standalone power supply at VBAT. It is for this reason that the link between
VBATT and VBAT (J605) must be opened (by removing the solder at the top of the board in the
SUPPLY area). Note the following information regarding both power supplies.
 VBATT is powered by the current measuring power supply (66321B)
 VBAT is powered by the standalone power supply (AX502) through TP602
Also take note of the following additional configuration/settings:
 The R600 resistor and the D603 and D604 diodes (around the BAT-TEMP connector) must
be removed.
 The UART2 link is not used; therefore, J201, J202, J203, J204 must be opened (by removing
the solder).
 The “FLASH-LED” must be not used, so J602 must be opened (by removing the solder).
 The USB link is not used, therefore J301, J302, J303, J304, J305 must be opened (by
removing the solder).
 The audio is not used, therefore J702, J703, J704, J705, J605 must be opened (by removing
the solder).
 There is no SIM detect feature on the AirPrime WISMO218; therefore, J403 must be opened
(by removing the soldered).
 Charging is not used; therefore, R602 must be removed.
 C600 and R607 must be removed to avoid unexpected current consumption.
 The switch, BOOT (around the “CONFIG” area), must be set to the OFF position.
The goal of the settings listed above is to eliminate all bias current from VBATT and to supply the
entire board (except the AirPrime WISMO218) using VBAT only.
4.1.3. Socket-Up Board Used
There is an adaptor board which is used to adapt the AirPrime WISMO218 to work on the AirPrime
WS Series Development Kit. It is called the socket-up board (WM0801706-020-20).
On this socket up board, the soldering point of J203, J204, JP101, JP102, JP103, JP104, JP105,
JP106 and JP107 must be opened.