7

Atmel ATWILC1000A [PRELIMINARY DATASHEET]

Atmel-42351A-WILC1000-SmartConnect-Datasheet_092014

5.2

Power Consumption

5.2.1

Description of Device States

Atmel WILC1000 device has several Device States:

5.2.2

Controlling the Device States

Table 5-1 shows how to switch between the device states using the following:

Table 5-1.

WILC1000 Device State Control

Note:

1.

The device is Idle in ON_Doze state during Passive Scan waiting for the Beacon Signal

5.2.3

Restrictions for Power_Off State

When the Atmel WILC1000 is in the Device State Power_Off, there is no power supplied to the device, i.e., the

DC/DC Converter output and VDDIO are both off (at ground potential). In this case, a voltage cannot be applied

to the WILC1000 pins because each pin contains an ESD diode from the pin to supply. This diode will turn on

when voltage higher than one diode-drop is supplied to the pin.

If a voltage must be applied to the signal pads while the chip is in a low power state, the VDDIO supply must be

on, so the SLEEP state must be used.

Similarly, to prevent the pin-to-ground diode from turning on, do not apply a voltage that is more than one diode-

drop below ground to any pin.



ON_Transmit



ON_Receive



ON_Doze



SLEEP



Power_Off

̶

Device is actively transmitting an 802.11 signal

̶

Device is actively receiving an 802.11 signal

̶

Device is on but is neither transmitting nor receiving

̶

Device is asleep with 1.2V supply off

̶

Device is powered off; VDD_1P2 and VDDIO are off



CHI_EN



VDDIO

̶

Device pin (pin #23) used to enable DC/DC Converter

̶

I/O supply voltage from external supply

Device State

CHIP_EN

VDDIO

Remark

Power Consumption

ON_Transmit

VDDIO

On

Transmitting

172mA @3.3V (18dBm)

149mA @2.5V (14dBm)

117mA @2.0V (10dBm)

ON_Receive

VDDIO

On

Receiving

70mA @3.3V (-90dBm)

65mA @3.3V (-87dBm)

ON_Doze

VDDIO

On

Idle(1)

< 1mA

SLEEP

GND

On

< 4µA