NXP Semiconductors PCF85053ATK-ARD Evaluation Board

NXP Semiconductors PCF85053ATK-ARD Evaluation Board is used to test and evaluate the functions and performances of the PCF85053A CMOS Real-Time Clock. The NXP Semiconductors PCF85053A is designed for low power consumption and automatic switching to battery on primary power loss. Equipped with clock output, alert interrupt output, and 128-byte battery backed-up SRAM, this device also offers two I²C buses.

Features

Arduino® Shield
- Equipped with Arduino Uno R3 compatible headers for direct connection to Arduino-compatible MCU EVKs
- On-board connector for external access and monitoring for I²C-bus / Alert / CLKOUT
- 1.8V / 3.3V selectable power supply
- On-board backup battery cell
- Fully compatible with MIMXRT1050-EVK board, including GUI (Windows® 10)
- Fully compatible with LPCXpresso55S69 dev. board, including GUI (Windows 10)
- Fully compatible with MIMXRT685-EVK board, including GUI (Windows 10)
Communication interface
- Two independent I²C interfaces
  - Primary I²C bus
    - Read/write capability on RTC and SRAM registers
  - Second I²C bus
    - Read/write capability on RTC and SRAM registers enabled by primary I²C
- I²C device addresses
  - 1101 111 RTC
  - 1010 111 SRAM
- I²C clock features
  - Max CLK frequency 400kHz
  - Max CLK Timeout 35ms
- I²C bus is not active when switching over to the battery

Operating voltage
- 1.7V to 3.6V supply voltage
- 1.55V to 3.6V battery supply voltage
Real-time clock features
- Real-time clock and calendar
- Provides year, month, day, weekday, hours, minutes, and seconds based on a 32.768kHz quartz crystal
- Support both binary mode and BCD mode
- Support 24-hour and 12-hour mode
- Support daylight saving mode
- Oscillator fail flag
- RTC clear flag
- RTC fail flag
- Alarm flag
Extra features
- Active low alert interrupt output
- Register definition aligned to MC146818B (0 to 09h)
- Configurable oscillator circuit for a wide variety of quartzes like CL = 6pF, CL = 7pF and CL = 12.5pF
- -40°C to 85°C operating temperature range
- Battery-backed 128-byte SRAM
- SRAM clear to ‘0’ by RTC_CLR# Pin
- Frequency adjustment via programmable offset register