Silex technology SX-550 manual Electrical Characteristics, Power Input, Power Management

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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.

3

1

JP7

J5

U1

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.

Page 12	silex	SX-550 Evaluation Daughtercard
		Hardware Configuration
	Part Number 40183-101