Datasheet

3 Functional Description
• Simultaneous advertising and scanning
• Multiple connections in simultaneous central and peripheral roles
• Adaptive frequency hopping and channel assessment
• LE channel selection algorithm #2
• Connection parameter update
• High duty cycle non-connectable advertising
• LE privacy 1.2
• LE data packet length extension
• Link layer extended scanner filter policies
• Low duty cycle directed advertising
• Link layer encryption
• LE Ping
3.8 Timers and Watchdogs
3.8.1 General Purpose Timers
ESP32-S3 is embedded with four 54-bit general-purpose timers, which are based on 16-bit prescalers and
54-bit auto-reload-capable up/down-timers.
The timers’ features are summarized as follows:
• A 16-bit clock prescaler, from 2 to 65536
• A 54-bit time-base counter programmable to be incrementing or decrementing
• Able to read real-time value of the time-base counter
• Halting and resuming the time-base counter
• Programmable alarm generation
• Timer value reload (Auto-reload at alarm or software-controlled instant reload)
• Level interrupt generation
For more information, please refer to Chapter Timer Group (TIMG) in ESP32-S3 Technical Reference
Manual.
3.8.2 System Timer
ESP32-S3 integrates a 52-bit system timer, which has two 52-bit counters and three comparators. The system
timer has the following features:
• Counters with a clock frequency of 16 MHz
• Three types of independent interrupts generated according to alarm value
• Two alarm modes: target mode and period mode
• 52-bit target alarm value and 26-bit periodic alarm value
• Read sleep time from RTC timer when the chip is awaken from Deep-sleep or Light-sleep mode
• Counters can be stalled if the CPU is stalled or in OCD mode
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ESP32-S3 Series Datasheet v1.2