RTC WatchDog HAT (B) For Raspberry Pi, Onboard DS3231SN High Precision RTC Chip

RTC WatchDog HAT (B) For Raspberry Pi, Onboard DS3231SN High Precision RTC Chip

This is an RTC WatchDog HAT (B) designed for Raspberry Pi with high-precision RTC and watchdog HAT, which refreshes and counts at a limited time and the watchdog circuit can reset the system.

User Manual / Datasheet / Example Codes Etc.

Features

• Onboard auto reset monitoring circuit.
• Onboard high-precision clock chip (DS3231SN) for providing accurate timing control.
• Support I2C communication and a 16-bit counter.
• Onboard the watchdog status indicator to warn the watchdog timeout.

Specifications

• Communication interface: I2C
• RTC chip: DS3231
• Watchdog chip: CH32V003
• Power supply: 5V
• Dimensions: 30.5mm x 65mm
• Fixed hole diameter: 3.0mm

Package Includes

• 1x RTC WatchDog HAT (B)
• 1x 2×20PIN female header 
• 1x Standoffs pack

Designed For Raspberry Pi Series

Standard Raspberry Pi 40PIN GPIO Header, For Raspberry Pi Series Boards, Jetson Nano

Auto Reset Monitoring

Monitoring Circuit With Auto Reset Function, Using I2C Communication

High Precision RTC

Incorporates DS3231SN High Precision RTC Chip, With Backup Battery Holder

Pinout Definition

What's On Board

1. USB Type-C power input

2. CH32V003 watchdog

3. CR1220 RTC battery holder

4. RTC power supply, supports CR1220 button cell

• Watchdog status indicator
• Blinking rapidly at a frequency of 100ms when the watchdog overflows
• After the watchdog overflows and runs the reboot command, it will blink at a frequency of 500ms if the host is detected as not having powered off
• Keeps on when the watchdog function is turned on
• Keeps off when the watchdog function is turned off

5. Power indicator

6. Raspberry Pi 40PIN GPIO header for connecting to Raspberry Pi

7. RTC chip DS3231 high precision RTC chip

8. Watchdog reset pin selection

9. Control interface for use with other host boards

Dimensions