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 - Alternate Power

1. VSYS (5V) (bottom pin)
2. DC IN (connects to J1)
3. GND (top pin)

J3 - SD Card

• MISO - AD9
  • GP4 on XIAO-RP2040 and SeeedStudio RP2040
  • PA09 on Adafruit SAMD21
• MOSI - AD10
  • GP3 on XIAO-RP2040 and SeeedStudio RP2040
  • PA10 on Adafruit SAMD21
• SCK - AD8
  • GP2 on XIAO-RP2040
  • GP6 on SeeedStudio RP2040
  • PA11 on Adafruit SAMD21
• SS - AD0
  • GP26 on XIAO-RP2040
  • GP29 on SeeedStudio RP2040
  • PA02 on Adafruit SAMD21

J4 - UART

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

• D6
  • GP0 on XIAO-RP2040
  • GP20 on Adafruit RP2040
  • PA06 on Adafruit SAMD21
• D7
  • GP1 on XIAO-RP2040
  • PA07 on Adafruit SAMD21
  • GP5 on Adafruit RP2040

J5 - I2C

1. GND
2. 3.3V
3. D4, SDA - GP6 on XIAO-RP2040
4. D5, SCL - GP7 on XIAO-RP2040

• D4
  • GP6 on XIAO-RP2040
  • GP24 on Adafruit RP2040
  • PA16 on Adafruit SAMD21
• D5
  • GP7 on XIAO-RP2040
  • GP25 on Adafruit RP2040
  • PA17 on Adafruit SAMD21

J6 - AD3

• Digital I/O 3
• Analog In 3
• GP29 on XIAO-RP2040
• GP24 on Adafruit RP2040
• PA05 on Adafruit SAMD21
• 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
• GP28 on XIAO-RP2040
• GP27 on Adafruit RP2040
• PA05 on Adafruit SAMD21
• PWM
• Capacitive touch input
• Pinout

1. GND
2. 3.3V
3. AD2

J8 - AD1

• Digital I/O 1
• Analog In 1
• GP27 on XIAO-RP2040
• GP28 on Adafruit RP2040
• PA03 on Adafruit SAMD21
• Capacitive touch input
• AREF pin
• Pinout

1. GND
2. 3.3V
3. AD1

Applications

Sample applications for the QTPy49-01 card.

• MMBASIC
• Land Boards CircuitPython code

MMBASIC XIAO RP2040

Run MMBASIC over USB port.

XIAO RP2040 MMBASIC Pin Assignments

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

SD Card Loader

• SD Card Loader

Mechanicals

Prototype

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

Assembly Sheet

• QTPy49-01 Rev 1 Assembly Sheet