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Low-power system design with AIROC™ Wi-Fi & Bluetooth® combo
chip and PSoC™ 6 MCU
Low-power overview
2
Low-power overview
2.1
AIROC™ CYW43012 Wi-Fi & Bluetooth® combo chip power modes
AIROC™ CYW43012 Wi-Fi & Bluetooth® combo chip has been designed with the stringent power consumption
requirements of battery-powered IoT devices in mind.
Table 1
Power modes in AIROC™ CYW43012 Wi-Fi & Bluetooth® combo chip
Power mode
Description
Active
•
•
•
Deep Sleep (DS0)
•
•
•
Power down (Off)
•
AIROC™ CYW43012 Wi-Fi & Bluetooth® combo chip includes an advanced WLAN power management unit (PMU)
sequencer, which provides significant power savings by putting the AIROC™ CYW43012 Wi-Fi & Bluetooth®
combo chip device into various power management states appropriate to the current environment and
activities that are being performed.
The PMU enables and disables internal regulators, switches, and other blocks based on the computation of the
required resources and a table that describes the relationship between resources and the time needed to
enable and disable them. Configurable, free-running counters (running at 32.768 kHz LPO clock) in the PMU
sequencer are used to turn ON/turn OFF individual regulators and power switches. Clock speeds are
dynamically changed (or gated altogether) for the current mode. Slower clock speeds are used wherever
possible. See the
AIROC™ Wi-Fi & Bluetooth® combo chip
Application note
All WLAN blocks in AIROC™ CYW43012 Wi-Fi & Bluetooth® combo chip are powered up
and fully functional with active carrier sensing and frame transmission and reception.
All required regulators are enabled and put in the most efficient mode based on the
load current.
Clock speeds are dynamically adjusted by the PMU sequencer.
The radio, analog domains, and most of the linear regulators are powered down. The
rest of AIROC™ CYW43012 Wi-Fi & Bluetooth® combo chip remains powered up in an
idle/retained state.
All main clocks (PLL, crystal oscillator, or TCXO) are shut down to reduce active power
to the minimum level. The 32.768-kHz LPO clock is available only for the PMU
sequencer. This is necessary to allow the PMU sequencer to wake up the chip and
transition to active mode.
Complete RAM needed for WLAN firmware is retained.
AIROC™ CYW43012 Wi-Fi & Bluetooth® combo chip is effectively powered OFF by
shutting down all internal regulators. The chip is brought out of this mode by external
logic re-enabling the internal regulators.
Table 1
lists the power modes supported in CYW43012.
for details on the PMU.
5
002-27910 Rev. *C
2023-05-29
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