8.2.2 Current Consumption in Various Device States
The following table shows different device states and their power consumption for the ATWILC3000A. The device states can be switched using the following:
- CHIP_EN – Module pin (pin 19) enables or disables the DC/DC converter
- VDDIO – I/O supply voltage from external supply
In the ON states, VDDIO is on and CHIP_EN is high (at VDDIO voltage level). To change from the ON states to Power_Down state, connect the RESETN and CHIP_EN pin to logic low (GND) by following the power-down sequence mentioned in Power-up/Down Sequence. When VDDIO is off and CHIP_EN is low, the chip is powered off with no leakage.
| Device State | Code Rate | Output Power (dBm) | Current Consumption(1) | |
|---|---|---|---|---|
| IVBAT | IVDDIO | |||
| ON_WiFi_Transmit | 802.11b 1 Mbps | 17.0 | 272 mA | 23.9 mA |
| 802.11b 11 Mbps | 18.5 | 269 mA | 23.9 mA | |
| 802.11g 6 Mbps | 17.5 | 281 mA | 23.9 mA | |
| 802.11g 54 Mbps | 16.0 | 234 mA | 23.9 mA | |
| 802.11n MCS 0 | 17.0 | 280 mA | 23.9 mA | |
| 802.11n MCS 7 | 13.0 | 229 mA | 23.9 mA | |
| ON_WiFi_Receive | 802.11b 1 Mbps | — | 60.5 mA | 23.6 mA |
| 802.11b 11 Mbps | — | 60.5 mA | 23.6 mA | |
| 802.11g 6 Mbps | — | 60.5 mA | 23.6 mA | |
| 802.11g 54 Mbps | — | 60.5 mA | 23.6 mA | |
| 802.11n MCS 0 | — | 60.5 mA | 23.6 mA | |
| 802.11n MCS 7 | — | 60.5 mA | 23.6 mA | |
| ON_BT_Transmit | BLE 1 Mbps | 1.5 | 98.6 mA |
2.5 mA |
| ON_BT_Receive | BLE 1 Mbps | — | 69.1 mA | 2.5 mA |
| Doze (Bluetooth® Low Energy Low Power) | — | — | 1.4 mA(2) | |
| Power_Down | — | — | 1.25 µA(2) | |
- Conditions: VBAT = 3.3V, VDDIO = 3.3V at 25°C.
- The current consumption mentioned for these states is the sum of the current consumed in the VDDIO and VBAT voltage rails.
When power is not supplied to the device (DC/DC converter output and VDDIO are off at ground potential), voltage cannot be applied to the ATWILC3000A pins because each pin contains an ESD diode from the pin to supply. This diode turns on when voltage higher than one diode drop is supplied to the pin.
If voltage must be applied to the signal pads when the chip is in a low-power state, the VDDIO supply must be on, so the Power_Down state must be used. Similarly, to prevent the pin-to-ground diode from turning on, do not apply voltage that is more than one diode drop below the ground to any pin.