DS3231MZ/V+

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1. Describe

The DS3231MPMB1 peripheral module provides the hardware required to interface with the DS3231M real-time clock (RTC) to any system using PmodK compatible Configurable expansion port for I2C communication. This IC is a low cost and extremely accurate I²C RTC. The device contains a battery input and maintains Accurate timing when device mains is turned on interrupted. Integration of microelectromechanical systems (MEMS) resonators enhances long-term Equipment Accuracy and Reduced Part Count on a production line. The device can Same footprint as the popular DS3231 RTC.

2. Feature

    1. -40°C to +85°C high accuracy time and date (±5ppm)

    2. 32.768kHz square wave output

    3. Digital temperature sensor with an accuracy of ±3NC

    4. 6-pin Pmod compatible connector (I2C)

    5. Portable example software written in C language

    6. Auxiliary header allows daisy-chaining of other modules on the I2C bus

    7. RoHS Compliant

    8. Verified PCB Layout

    9. Fully assembled and tested

3. I2C interface

The DS3231MPMB1 peripheral module can be connected to the host in one of two ways. It can be plugged directly into a Pmod compatible port (configured for I2C) via connector J1, or in this case, other I2C boards can be connected to the same I2C bus via connector J2.

4. I2C Interface (Daisy Chain Module)

Alternatively, peripheral modules can be connected to other I2C-based Pmod modules using a 4-conductor ribbon cable connected to the J2 connector. In this case, pins 1-4 and 5-8 of J2 provide two connection buses for I2C, allowing modules to be plugged into an I2C bus daisy chain. Connector J1 connects the module to the Pmod host. Pin functions and pin assignments follow the Digilent recommended Pmod standard. The J2 connector allows modules to be connected to the same bus by daisy-chaining from another I2C module and/or providing I2C and power to other I2C modules.

5. Software and FPGA Code

Example software and drivers are provided for direct execution without modification on multiple FPGA development boards supporting integrated or integrated microprocessors. These boards include the Digilent Nexys 3, Avnet LX9 and Avnet ZEDBoard, but other platforms can be added over time. Maxim provides complete Xilinx ISE projects, including HDL, Platform Studio, and SDK projects. In addition, a synthesized bitstream is provided for the demo application that can be downloaded by the FPGA. The software project (for the SDK) contains several source files designed to accelerate customer evaluation and design. It includes a base application (maximModules.c) that demonstrates the functionality of the module, and uses the API interface (maximDeviceSpecific Utilities.c) to set up and access Maxim device functionality in a specific module. The source code is written in standard ANSI C format, and all API documentation including theory/operation, register descriptions, and function prototypes are documented in the API interface files (maximDeviceSpecificUtilities.h & .c).