Battery chargers can also be very easily integrated with the Pico powerchain. This allows significant flexibility in powering the unit from various sources such as a single Lithium-Ion cell, or 3 AA cells in series. Pico uses an on-board buck-boost SMPS which is able to generate the required 3.3 volts (to power RP2040 and externalcircuitry) from a wide range of input voltages (~1.8 to 5.5V). Four RP2040 IO are used for internal functions - driving an LED, on-board Switched Mode Power Supply (SMPS) power control and sensing the system voltages. The majority of the RP2040 microcontroller pins are brought to the user IO pins on the left and right edge of the board. Pico provides minimal (yet flexible) external circuitry to support the RP2040 chip (Flash, crystal, power supplies and decoupling and USB connector).
It feature the RP2040 which marks Raspberry Pi's first microcontroller designed in-house. The Raspberry Pi Pico is a low-cost, high-performance microcontroller board with flexible digital interfaces.
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