Specifications

HM-WF8266A
E-mail:[e-mail] www.hoperf.com Rev1.0
8. Power Management
Unless otherwise stated, the following power consumption data is tested with a supply voltage
of 3.3V and an ambient temperature of 25°C; the Tx power consumption data is based on a 50%
transmit duty cycle.
Notes:
① Modem-sleep mode is used in the applications that require the CPU to be working, as in
PWM orI2S applications. According to 802.11 standards (like U-APSD), it shuts down the Wi-Fi
Modem circuit while maintaining a Wi-Fi connection with no data transmission to optimize
power consumption. E.g. in DTIM3, maintaining a sleep of 300 ms with a wakeup of 3 ms cycle
to receive AP’s Beacon packages at interval requires about 15 mA current.
② During Light-sleep mode, the CPU may be suspended in applications like Wi-Fi switch.
Without data transmission, the Wi-Fi Modem circuit can be turned off and CPU suspended to
save power consumption according to the 802.11 standards (U-APSD). E.g. in DTIM3,
maintaining a sleep of300 ms with a wakeup of 3ms to receive AP’s Beacon packages at interval
requires about 0.9 mA current.
③ During Deep-sleep mode, Wi-Fi is turned off. For applications with long time lags between
data transmission, e.g. a temperature sensor that detects the temperature every 100s, sleeps
for 300sand wakes up to connect to the AP (taking about 0.3 ~ 1s), the overall average current
is less than1mA. The current of 20 μA is acquired at the voltage of 2.5V.