Description
BUY M48T59Y-70PC1U https://www.utsource.net/itm/p/12609060.html
| Parameter |
Description |
| Device Type |
Real-Time Clock (RTC) with Integrated SRAM and I2C Interface |
| Manufacturer |
STMicroelectronics |
| Package Type |
SOIC-8 |
| Operating Temperature |
-40°C to +85°C |
| Supply Voltage Range |
2.0V to 5.5V |
| Clock Accuracy |
±2 minutes per year at 25°C |
| SRAM Size |
512 bytes |
| I2C Address |
User-programmable |
| Oscillator Type |
Built-in 32.768 kHz oscillator |
| Backup Supply |
Supports VBAT for backup power |
| Power Consumption |
Low-power design, < 100 nA in backup mode |
Instructions:
Powering the Device:
- Connect the VCC pin to a supply voltage between 2.0V and 5.5V.
- Connect the VBAT pin to a backup power source to retain data during main power loss.
Communication Setup:
- Use the I2C interface to communicate with the device.
- Set the I2C address as required using address pins or software configuration.
Initialization:
- After powering up, initialize the RTC by setting the time and date registers via I2C commands.
Reading Time and Date:
- Use specific I2C read commands to fetch current time and date information from the RTC registers.
Writing to SRAM:
- Access the integrated SRAM using standard I2C write commands for storing user data.
Backup Mode:
- Ensure VBAT is connected to maintain SRAM and RTC operation when VCC is not available.
Handling Power Failures:
- Implement circuitry to switch from VCC to VBAT seamlessly during power interruptions.
Testing:
- Verify correct operation by setting and reading back time/date values and checking SRAM retention after power cycles.
(For reference only)
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