AZ01 USB

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Read this official Leafony page and explain its key points in English. For hardware help, first ask for a photo or the installed leaf models, assembly and power sources, then the goal and tools. Clarify which LED or display changed and whether a cable or leaf was replaced. Do not equate an unseen reset button with an absent one, or I2C acknowledgement with a working display. Verify specifications against sources; distinguish observations from hypotheses. Follow a redirect to its destination; if unreadable, ask for the relevant text instead of guessing.

Page: AZ01 USB

URL: https://docs.leafony.com/en/leaf/others/az01/

Description / headings (excerpt): Features / Specification / Dimension / USB-UART conversion

Features

Upload sketches to an AVR MCU over USB and view the MCU’s output in a serial monitor on your computer. This leaf also supplies power from USB to the other leaves. It uses an FTDI FT232RQ for USB-to-UART conversion and a step-down circuit to generate 3.3 V from USB VBUS (5 V), supplying both VBUS and 3.3 V to the leaves.

Specification

Dimension

Item	Description
Dimension	W23×D20.9×H4.7mm

USB-UART conversion

Item	Description
Part Number	FT232RQ
USB	USB 2.0 Full Speed
Data transfer rates	300 baud to 3 Mbaud

Power Supply

Item	Description
Part number	XCL222B331ER-G
Output voltage	3.3V±2%
Controlling method	PWM/PFM Automatic switching control
Maximum output current	500mA
Protection circuit	Over current protection / thermal shutdown/short-circuit protection

Block diagram

Pinassign

Tips

About micro USB and LED

Item	Description
micro USB	It is used for writing a sketch to the MCU and serial monitoring by connecting a PC.This also converts USB’s VBUS(5V) to 3.3V by using step-down power circuit and provide VBUS and 3.3V to each leaf.
LED TX	LED which controlled by FT232RQ. Blinks when program is written by UART TX communication.
LED RX	LED which controlled by FT232RQ. Blinks when program is written by UART TX communication.

Document

Revision history

Rev A1.0: First edition, August 2019