Provides two configurable alarm clock and a calendar can be set to a square wave output. Address and data are transferred serially through an I2C bidirectional bus.
A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, provide a reset output, and if necessary, automatically switch to the backup power supply. In addition, / RST pin is monitored as generating μP reset manually
Features:
- Operating voltage :3.3 – 5 .5 V
- clock chip: high-precision clock chip DS3231
- Clock Accuracy :0-40 ℃ range, the accuracy 2ppm, the error was about 1 minute
- calendar alarm clock with two
- programmable square-wave output
- Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation
- chip temperature sensor comes with an accuracy of ? 3 ℃
- memory chips: AT24C32 (storage capacity 32K)
- IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
- can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57
- Size: 38mm (length) * 22mm (W) * 14mm (height)
- Weight: 8g
