Arduino Leonardo Pinout and Specification

Arduino Leonardo Pinout includes 20 digital I/O pins, 12 analog inputs and 7 PWMs. It uses ATmega32U4 microcontroller working at 16 MHz.

4. Arduino Technical Details - Arduino: A Technical Reference [Book]

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Pololu - A-Star 32U4 Prime SV

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ETechnophiles - Arduino Leonardo pinout . To know more

20 digital I/O, 7 which support PWM and up to 12 analog inputs.

Leonardo

Pinout - UDOO BOLT Docs

Arduino Micro — Specs, Capabilities & Pinout

Arduino Pro Mini: digital, analog, and PWM pins