5.2 Controlling Device States
The following table shows different device states and their power consumption for the ATWINC3400-MR210xA . 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 Figure 5-1. 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 | 16.7 | 271 mA | 24 mA |
| 802.11b 11 Mbps | 17.5 | 265 mA | 24 mA | |
| 802.11g 6 Mbps | 18.3 | 275 mA | 24 mA | |
| 802.11g 54 Mbps | 13.0 | 235 mA | 24 mA | |
| 802.11n MCS 0 | 17.5 | 272 mA | 24 mA | |
| 802.11n MCS 7 | 12.5 | 232 mA | 24 mA | |
| ON_WiFi_Receive | 802.11b 1 Mbps | N/A | 63.9 mA | 23.7 mA |
| 802.11b 11 Mbps | N/A | 63.9 mA | 23.7 mA | |
| 802.11g 6 Mbps | N/A | 63.9 mA | 23.7 mA | |
| 802.11g 54 Mbps | N/A | 63.9 mA | 23.7 mA | |
| 802.11n MCS 0 | N/A | 63.9 mA | 23.7 mA | |
| 802.11n MCS 7 | N/A | 63.9 mA | 23.7 mA | |
| ON_BT_Transmit | BLE 1 Mbps | 3.3 | 79.37 mA |
23.68 mA |
| ON_BT_Receive | BLE 1 Mbps | N/A | 51.36 mA | 23.68 mA |
| Doze (Bluetooth Low Energy Idle) | N/A | N/A | 53 mA (2) | |
| Doze (Bluetooth Low Energy Low Power) | N/A | N/A | 1 mA (2) | |
| Power_Down | N/A | N/A | 10.5 uA(2) | |
- Conditions: VBAT = 3.3V, VDDIO = 3.3V, at 25°C.
- Current consumption mentioned for these states is the sum of current consumed in 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 ATWINC3400-MR210xA module 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.