QTPy49-01

Features

• CPU choices are
  • QT Py (SAMD based)
    • Adafruit QT Py SAMD21 Product Page
    • Seeeduino XIAO
    • 48 MHz
  • QT Py (RP2040 based)
    • Adafruit QT Py RP2040 Product page
    • Seeed XIAO RP2040 Product page
    • 133 MHz
  • XIAO ESP32C3
    • SeeedStudio XIAO ESP32C3 (New 2022-07)
    • RISC-V Single Core
    • Up to 160 MHz
    • 400 KB SRAM
    • 4 MB Flash
    • 2.4GHz Wi-Fi subsystem
    • Wiki
    • ESP32C3 Datasheet
• Connectors/Headers
  • SD card
  • DC Power
  • AD1 GVS
  • AD2 GVS
  • AD3 GVS
  • I2C with ground/VCC
  • TX/RX with ground/VCC
• QTPy49 can be powered from with either the USB C or DC jack
  • Automatic Schottky diode power switching between
    • 5V from USB C
    • 5V on external DC jack
    • 7-12V on DC jack
• 49x49mm ODAS form factor
• (4) 4-40 mounting holes

CPU Pinouts

Adafruit QT Py SAMD

Seeed Studio XAIO SAMD

Adafruit QT Py RP2040

Seeed Studio XAIO RP2040

Connectors/Headers

• Ground, Voltage, Signal (GVS) connections

J1 - DC In

• QTPy49 can be powered from either the USB C or DC jack
  • Automatic Schottky diode power switching
    • Can use a regular Silicon Diode with sufficient current ex: 1N400X)
  • 7-12V if regulator is installed
  • 5V if regulator is not installed (install J2 jumper if not using regulator)
• Center positive

J2 - Alt Power

1. VREG (bottom pin)
2. VIN
3. GND (top pin)

J3 - SD Card

• MISO - GP4 (AD9)
• MOSI - GP3 (AD10)
• SCK - GP2 (AD8)
• SS - GP26 (AD0)

J4 - UART

1. GND
2. 3.3V
3. TX, D6
4. RX, D7

J5 - I2C

1. GND
2. 3.3V
3. D4, SDA
4. D5, SCL

J6 - AD3

• Digital I/O 3
• Analog In 3
• PWM output
• Capacitive touch input
• Pinout

1. GND
2. 3.3V
3. AD3 (wired to J3-3)

J7 - AD2

• Digital I/O 2
• Analog In 2
• PWM
• Capacitive touch input
• Pinout

1. GND
2. 3.3V
3. AD2

J8 - AD1

• Digital I/O 1
• Analog In 1
• Capacitive touch input
• AREF pin
• Pinout

1. GND
2. 3.3V
3. AD1

MMBASIC XIAO RP2040 pin assignments

OPTION SERIAL CONSOLE COM1,GP0,GP1
OPTION SYSTEM SPI GP2,GP3,GP4
OPTION COLOURCODE ON
OPTION SDCARD GP26

Applications

Sample applications for the QTPy49 card.

• Land Boards CircuitPython code

SD Card Loader

• SD Card Loader

Prototype

• Built on QTPy49 and SD_CARD_X49 cards
• Can be powered from USB C connector or DC jack

Mechanicals

Assembly Sheet

• QTPy49 Rev 1 Assembly Sheet