DS3231MEVKIT#

DS3231MPMB1 Peripheral Module General Description Features The DS3231MPMB1 peripheral module provides the nec- S High Accuracy Time-of-Day and Date (5ppm) essary hardware to interface the DS3231M real-time clock from -40C to +85C (RTC) to any system that utilizes PmodK-compatible S 32.768kHz Square-Wave Output 2 expansion ports configurable for I C communication. S Digital Temp Sensor with 3NC Accuracy The IC is a low-cost and extremely accurate IC RTC. 2 S 6-Pin Pmod-Compatible Connector (I C) The device incorporates a battery input and maintains accurate timekeeping when main power to the device is S Example Software Written in C for Portability interrupted. The integration of the microelectromechani- S Secondary Header Allows Daisy-Chaining of cal systems (MEMS) resonator enhances the long-term 2 Additional Modules on the I C Bus accuracy of the device and reduces the piece-part count S RoHS Compliant in a manufacturing line. The device is available in the same footprint as the popular DS3231 RTC. S Proven PCB Layout Refer to the DS3231M IC data sheet for detailed informa- S Fully Assembled and Tested tion regarding operation of the IC. Ordering Information appears at end of data sheet. DS3231MPMB1 Peripheral Module Pmod is a trademark of Digilent Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 19-6337 Rev 0 5/12 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com.DS3231MPMB1 Peripheral Module Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION J1 1 6-pin right-angle male header Battery holder BAT1 1 Memory Protection Devices 8-pin (2 x 4) straight male J2 1 BH401 header R1R4 4 150I Q5% resistors (0603) 1FF Q10%, 10V X7R ceramic C1 1 capacitor (0603) R5R8 4 4.7kI Q5% resistors (0603) TDK C1608X7R1A105K 2 Q5ppm, I C real-time clock U1 1 (8 SO) 0.1FF Q10%, 10V X74 ceramic Maxim MAX3231MZ+ C2 1 capacitor (0603) Murata GRM188R71C104KA01D 1 PCB: EPCB3231PM1 Component Suppliers SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the DS3231MPMB1 when contacting these component suppliers. 2 Table 1. Connector J1 (I C Communication) Detailed Description PIN SIGNAL DESCRIPTION 2 I C Interface Active-low reset. This pin is an open- The DS3231MPMB1 peripheral module can interface to drain input/output. It is pulled low if V the host in one of two ways. It can plug directly into a CC 2 falls below threshold. This output is Pmod-compatible port (configured for I C) through con- 1 RST 2 combined with a debounced pushbutton nector J1, or in this case, other I C boards can attach to input function that can be activated to 2 the same I C bus through connector J2. cause a reset request. 2 I C Interface (Daisy-Chaining Modules) Active-low interrupt or 1Hz square-wave Alternatively, the peripheral module can connect to other 2 2 output. Interrupt function is activated INT/SQW I C-based Pmod modules using a 4-conductor ribbon when alarm occurs. cable connecting to the J2 connector. In this situation, 2 2 pins 1-4 and 5-8 of J2 provide two connections to the I C 3 SCL I C serial clock 2 bus, allowing the module to be inserted into an I C bus 2 4 SDA I C serial data daisy-chain. 5 GND Ground Connector J1 provides connection of the module to 6 VCC Power supply the Pmod host. The pin functions and pin assignments adhere to the Pmod standard recommended by Digilent. 2 Table 2. Connector J2 (I C Expansion) See Table 1. PIN SIGNAL DESCRIPTION The J2 connector allows the module to be connected 2 2 1 SCL I C serial clock through a daisy-chain from another I C module and/or 2 2 2 provide I C and power connections to other I C modules 2 SDA I C serial data on the same bus. See Table 2. 3 GND Ground 4 VCC Power supply Battery Backup 5 SCL 2-wire serial clock (same as pin 1 above) The peripheral module contains a battery holder for a lithium coin cell battery. The battery allows the IC to retain 6 SDA 2-wire serial data (same as pin 2 above) settings and time in the event of main power loss. 7 GND Ground 8 VCC Power supply Note: A battery MUST be present for the DS3231MPMB1 to operate properly. Maxim Integrated 2