Details
RTC WatchDog HAT (B) For Raspberry Pi, Onboard DS3231SN High Precision RTC Chip
RTC WatchDog HAT (B) for Raspberry Pi
Real time clock, watchdog, all in one compact module
![](/img/devkit/accBoard/RTC-WatchDog-HAT-B/RTC-WatchDog-HAT-B-details-1.jpg)
Designed for Raspberry Pi series
Standard Raspberry Pi 40PIN GPIO header, for Raspberry Pi series boards, Jetson Nano
![](/img/devkit/accBoard/RTC-WatchDog-HAT-B/RTC-WatchDog-HAT-B-details-3.jpg)
for reference ONLY, the Raspberry Pi boards and Jetson Nano are NOT included.
Auto reset monitoring
monitoring circuit with auto reset function, using I2C communication
![](/img/devkit/accBoard/RTC-WatchDog-HAT-B/RTC-WatchDog-HAT-B-details-5.jpg)
High precision RTC
incorporates DS3231SN high precision RTC chip, with backup battery holder
![](/img/devkit/accBoard/RTC-WatchDog-HAT-B/RTC-WatchDog-HAT-B-details-7.jpg)
What's On Board
![](/img/devkit/accBoard/RTC-WatchDog-HAT-B/RTC-WatchDog-HAT-B-details-intro.jpg)
- USB Type-C power input
- CH32V003 watchdog
- CR1220 RTC battery holder
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
- Power indicator
- Raspberry Pi 40PIN GPIO header
for connecting to Raspberry Pi - RTC chip
DS3231 high precision RTC chip - Watchdog reset pin selection
- Control interface
for use with other host boards
Pinout definition
![](/img/devkit/accBoard/RTC-WatchDog-HAT-B/RTC-WatchDog-HAT-B-details-inter.jpg)
Product show
![](/img/devkit/accBoard/RTC-WatchDog-HAT-B/RTC-WatchDog-HAT-B-details-9.jpg)
Outline dimensions
![](/img/devkit/accBoard/RTC-WatchDog-HAT-B/RTC-WatchDog-HAT-B-details-size.jpg)
Resources & Services
![](/img/devkit/LCD/common/res_banner.png)
* Resources for different product may vary, please check the wiki page to confirm the actually provided resources.
Weight: 0.028 kg
Quick Overview
- RTC WatchDog HAT (B) x1
- 2×20PIN female header x1
- Standoffs pack x1
1![](/img/devkit/accBoard/RTC-WatchDog-HAT-B/RTC-WatchDog-HAT-B-1_220.jpg)
![](/img/devkit/accBoard/RTC-WatchDog-HAT-B/RTC-WatchDog-HAT-B-1_220.jpg)
2![](/img/devkit/accessories/2x20-2.54-8.5-12-female-header-black_93.jpg)
![](/img/devkit/accessories/2x20-2.54-8.5-12-female-header-black_93.jpg)
3![](/img/devkit/general/6-angle-M25x15-Copperx4pcs_93.jpg)
![](/img/devkit/general/6-angle-M25x15-Copperx4pcs_93.jpg)