Silex technology WLAN MODULE SX-550 - Manual (Page 18)

Page 12 silex SX-550 Evaluation Daughtercard
Hardware Configuration
Part Number 40183-101
Electrical Characteristics
The power requirements, port pinouts, GPIO characteristics, cable connections and wireless operational
modes are described below.
Power Input
Power to the SX-550 WLAN Module and Evaluation Daughtercard is supplied through the power jack,
located at J4, at +5VDC ±10%. Use a +5VDC power supply with a minimum of 1 amp capacity.
Power of +3.3VDC ±5% is input to the SX-550 WLAN Module via the OEM header, J5.
Power Management
Power for the SX-550 WLAN Module is less than 3 watts in normal power mode and peak consumption is
less that 3.3 watts. In low power mode average power is 1.2 watts.
Serial Peripheral Interface
The four SPI signals are accessible using the 20-pin header JP7. The Data Out, Data In and Clock
signals are routed to both the JP7 header and an on-board temperature sensor. The SPI Chip Select
signal is selectable to either the JP7 header or to the temperature sensor using the 3-pin header JP1.
JP7
J5
U1
3
1
Figure 6 JP1 Header
Routing the SPI Chip Select Signal
To select the on-board temperature sensor, place the jumper on pins 1 and 2.
To route the Chip Select signal to JP7, place the jumper on pins 2 and 3.