NXP Semiconductors PCF85053ATK ARD

PCF85053ATK-ARD is used to evaluate the functions and performances of PCF85053A through the use of Arduino Shield connector.

PCF85053A is a CMOS real-time clock (RTC) and calendar optimized for low power consumption and automatic switching to battery on primary power loss. Featuring clock output, alert interrupt output and 128-byte battery backed-up SRAM.

The PCF85053A includes two I2C buses:

I²C#1 : read/write capability on RTC and SRAM registers;

I²C#2 : can read/write most registers with the control bits set by primary I2C master.

PCF85053A: Bootable CPU RTC with Two I2C buses, 128 Byte SRAM and alarm function

Key features

• RTC with alarm register and SRAM
• Battery-backed 128-byte SRAM
• Supply voltage V_DD: 1.5 V to 3.6 V
• Two I2C interfaces: 1 for Read/Write, 1 for Read-only

Additional 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
• 1.8 V / 3.3 V selectable power supply
• On-board backup battery cell
• Fully 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)
   

Operating voltage

• Supply voltage: 1.7 V to 3.6 V
• Battery supply voltage: 1.55 V to 3.6 V
   

Communication interface

• Two independent I2C interfaces:
   

1. Primary I2C bus: Read/write capability on RTC and SRAM registers
2. Second I2C bus: Read/write capability on RTC and SRAM registers enabled by primary I2C
    

Real-time clock features

• Real-time clock and calendar
• Provides year, month, day, weekday, hours, minutes and seconds based on a 32.768 kHz 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: CL = 6 pF, CL = 7 pF and CL = 12.5 pF
• Operating temperature range -40 °C to 85 °C

Applications

• Interface ICs for servers used in data centers
• Air Conditioning (AC)
• Heat metering
• Industrial HMI
• Motion control and robotics
• Programmable Logic Controller (PLC) and remote I/O
• Open and closed loop payments
• POS terminal