1. USB Type-C power input
2. MAX705 watchdog
3. Watchdog output enable
   1: enabled
   0: disabled
4. CR1220 RTC battery holder: RTC power supply supports CR1220 button cell
5. Watchdog output warning: lights up if the watchdog is overflow
6. Raspberry Pi 40PIN GPIO header
7. RTC chip: DS3231 high precision RTC chip
8. Watchdog reset pin selection
9. Control interface for use with other host boards

Features :

1. MAX705 monitoring circuit with auto-reset function
2. Incorporates DS3231SN high precision RTC chip, with backup battery holder
3. Reset pin selection for switching watchdog
4. Indicator for watchdog output warning

Specifications:

Max705 Specifications:

1. Operating Voltage Range:1~5.5 V
2. Supply Current:150 µA
3. Reset Threshold Voltage:4.50~4.75 V
4. Watchdog Timeout Period:1~2.25 V
5. WDI Input Current: 50 µA

DS3231 Specifications:

1. Supply Voltage:2.3~5.5 V
2. Active Supply Current: (i)200 µA @3.3 V (ii)300 µA @5.5 V
3. Output Frequency:32.768 kHz
4. SCL Clock Frequency:100 kHz

Package Includes:

1 x Waveshare RTC WatchDog HAT for Raspberry Pi, Auto Reset, High Precision RTC