Datasheet

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3. Functional Description
distributed control function (DCF) but also P2P group operation compliant with the latest
Wi-Fi P2P protocol. Low level protocol functions are handled automatically by ESP8285.
• RTS/CTS
• acknowledgement
• fragmentation and defragmentation
•
aggregation
• frame encapsulation (802.11h/RFC 1042)
• automatic beacon monitoring / scanning, and
•
P2P Wi-Fi direct
Passive or active scanning, as well as P2P discovery procedure is performed autonomously
once initiated by the appropriate command. Power management is handled with minimum
interaction with host to minimize active duty period.
3.6. Power Management
ESP8285 is specially designed for mobile devices, wearable electronics and the Internet of
Things applications with advanced power management technologies.
The low-power architecture operates in 3 modes: active mode, sleep mode and Deep-
sleep mode. ESP8285 consumes about than 20 μA in Deep-sleep mode (with RTC clock
still running) and less than 1.0 mA (DTIM=3) or less than 0.6 mA (DTIM=10) to stay
connected to the access point.
!
Figure 3-2. Power Management
Work
Off
Deep Sleep
Sleep XTAL Off
Wakeup
CPU On
Tx Rx
WAKEUP Events
XTAL_SETTLE
CHIP_PU
CHIP_PU
Sleep Criteria
Sleep Criteria
Espressif
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2017.05