This is a high-precision RTC expansion module specifically designed for the Raspberry Pi Pico.

The module incorporates a high-precision DS3231 RTC chip and uses the I2C bus for communication. The stackable design allows you to add other hardware whilst using the RTC board.

Note: Raspberry Pi Pico not included. You'll need a Pico with male headers soldered to it. You can grab a Pico here and Pico male headers here, or buy a Pico with pre-soldered headers.

Features

• Standard Raspberry Pi Pico header, supports Raspberry Pi Pico series
• Onboard high precision RTC chip DS3231, with backup battery holder
• Real-Time Clock Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year Compensation Valid Up to 2100
• Optional format: 24-hour OR 12-hour with an AM/PM indicator
• 2x programable alarm clock
• Online development resources and manual (Raspberry Pi Pico C/C++ and MicroPython examples)
• Dimensions: 52mm x 21mm

Note: Raspberry Pi Pico and CR1220 battery not included

What's On Board

• 1) DS3231
  • High-precision RTC chip, I2C bus
• 2) RTC backup battery
  • Supports CR1220 button cell
• 3) Power indicator
  • Enabled by soldering a 0Ω resistor on the jumper, disabled by default
• 4) Raspberry Pi Pico header
  • For attaching to Raspberry Pi Pico, stackable design

Resources

• Product Wiki

Package Contents

• 1x Pico RTC Module

Raspberry Pi Pico and CR1220 battery not included

Pinout

Specifications

Operating Voltage	3.3V
Battery Backup Voltage	2.3V ~ 5.5V
Operating Temperature	-40°C ~ +85°C
Power Consumption	100nA (sustains data and clock information)