RICOH R2025S/D High precision I 2 C-Bus Real-Time Clock Module Manual
Update: 01 October, 2023
The R2025S/D is a high-precision I2C bus real-time clock module, built-in CMOS real-time clock IC and crystal oscillator, connected to the CPU by two signal lines, SCL and SDA, and configured to perform serial transmission of time and calendar data to the CPU. The oscillation frequency is adjusted to high precision (0±5 ppm: 15 sec. per month at 25°C) The periodic interrupt circuit is configured to generate interrupt signals with six selectable interrupts ranging from 0.5 seconds to 1 month. The 2 alarm interrupt circuits generate interrupt signals at preset times. As the oscillation circuit is driven under constant voltage, fluctuation of the oscillator frequency due to supply voltage is small, and the time keeping current is small (TYP. 0.48μA at 3V). The oscillation halt sensing circuit can be used to judge the validity of internal data in such events as power-on; The supply voltage monitoring circuit is configured to record a drop in supply voltage below two selectable supply voltage monitoring threshold settings. The 32-kHz clock output function (CMOS output) is intended to output sub-clock pulses for the external microcomputer. The oscillation adjustment circuit is intended to adjust time by correcting deviations in the oscillation frequency of the crystal oscillator.
Brand: RICOH
File format: PDF
Size: 867 KB
MD5 Checksum: A38993B7D70E68A7DC4744CB6F4E82F2
Publication date: 10 July, 2012
Downloads: -
PDF Link: RICOH R2025S/D High precision I 2 C-Bus Real-Time Clock Module Manual PDF