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?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 1 of 14 cbc-eval-12-34123 system features and overview cbc-eval-12-34123 is a demonstration kit featuring the cymbet cbc34123 enerchip rtc - an integrated surface mount device combining an nxp pcf2123 real-time clock (rtc), power management circuit, and solid state rechargeable enerchip providing 30 hours of backup power to the rtc. the kit demonstrates just how compact an rtc with integrated backup power can be using the low profile surface mount device from cymbet. the combined solution occupies only 0.25 cm 2 of board space. cbc-eval-12-34123 has the following elements: ? low power rtc with spi-interface bus ? solid state rechargeable energy storage for real- time clock backup power ? power fail detect with automatic switchover from main power to integrated backup power source ? integrated battery management that controls battery charging and discharge cutoff, ensuring maximum service life of the on-board storage cell ? usb connector for easy demonstration and application development on personal computer ? input/output access to board for easy connection to external microcontroller figure 2: cbc-eval-12-34123 demo kit. preliminary enerchip? rtc evaluation kit real-time clock with integrated backup power figure 1: cbc-eval-12-34123 block diagram. smallest rtc power backup footprint the block diagram of figure 1 illustrates the cbc- eval-12-34123, an extremely compact low power rtc with integrated backup power source. eval-12 graphical user interface the cbc-eval-12-34123 includes a pc-based software application that communicates with the usb stick. users can set the time of day, date, and countdown timer values to experiment with rtc power-back-up. the application also allows the user access to the rtc registers for viewing and modifcation. the software works with microsoft windows xp, windows 7, and windows 8 operating systems. once the eval-12 usb stick is inserted into the pc, the connect button is clicked in the gui to establish communication over the usb port. the entire usb stick or just the cbc34123 tab board can then be removed from the pc and the rtc will be powered by the enerchip rechargeable solid state battery that is integrated within the cbc34123 5mm x 5mm qfn package on the cbc34123 tab board. figure 2 shows the usb interface board to the left, and the cbc34123 enerchip rtc tab board to the right. cymbet enerchip and power management solid state backup power source with integrated power management usb interface circuit and connector nxp pcf2123 real-time clock cbc34123 enerchip rtc 5-pin computer interface to cbc34123 full access to rtc registers! graphical user interface for easy application development!
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 2 of 14 cbc-eval-12 module connector, jumpers, and test points figure 3: locations of jumpers. jumpers and connectors jumper pin number designation j3 1 ext enerchip (+) 2 ext enerchip (-) j4 pcb trace rtc pwr - cut jumper to disable rtc pwr led j5 1 gnd 2 power 3 spi-scl 4 int/ 5 spi-sdi 6 nc 7 spi-sdo 8 nc 9 spi-ce 10 nc 11 reset/ 12 en 13 clkoe 14 clkout 15 gnd 16 power j6 pcb trace enable - cut jumper to enable/disable the cbc34123 charge pump j7 pcb trace clkoe - cut jumper and tie j5-p13 high (to rtc pwr, j5-p2 or j5-p16) to enable clock output signal on j5-p14 j3 j5 j4 j6 j7 cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 3 of 14 getting started before inserting the usb dongle into the usb port, proceed with the fle downloads as described below. for frst time users who have not installed the demonstration software, follow these steps: 1. download the cbc-eval-12-34123 fles from the web site and save them to your computer: the directory structure loaded to your computer will look like the following: 2. do not yet insert any hardware into the usb port. launch the application by clicking on cdm20830_setup. 3. a dialog box will appear, asking: do you want to allow the following program to make changes to this com - puter? click the yes option. 4. the following window will appear. click extract. cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 4 of 14 5. when the following window appears click next. 6. once the fles have loaded, the following window will appear. click finish. this installs the fles pertaining to the usb interface. 7. next, launch the application by opening the setup fle - as highlighted in the following diagram - located in the directory. cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 5 of 14 8. when the following window appears, click next. cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 6 of 14 9. when the following window appears, select an installation folder destination on your computer and click next. 10. the following window will appear. again, click next. cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 7 of 14 11. the following window will appear. allow the installation to continue and when the message do you want to allow the following program from an unknown publisher to make changes to this computer? appears, answer yes. 12. once the installation is complete, the following window will appear. click close. cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 8 of 14 13. there should now be an eval12 demo shortcut icon on your desktop, as shown below. double-click on the icon to launch the graphical user interface (gui). gui installation is now complete. the following window should appear. 14. insert the cbc-eval-12-34123 dongle into the usb port. it can take up to a minute for the computer to recognize the new hardware. 15. both red leds on the eval stick - one on the usb board and the other on the tab board - should be lit. click the connect button on the gui. the computers system time should now appear active in the gui. at the top right of the window, cbc-tab-34123 found is indicated, along with messages: rtc connected at the top left. cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 9 of 14 16. click rtc ec power to disable power from the dongle. the rtc ec power indicator on the gui will turn off, as will the pwr led on the cbc34123 tab board. click rtc ec power to again apply power to the dongle. 17. there are several confguration options available to the user from the rtc control menu. to view the available options, open the rtc control drop-down menu and select from the 3 options as shown below. cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 10 of 14 18. the set rtc date/time option allows the user to set a specifc date and time. enter any arbitrary date and time as the starting time, using either the drop-down calendar menu, or by manually entering the data. click ok to execute the command. the rtc count down timer option allows the user to apply a value from 0 to 255 in secs feld. 19. enter a valid number and click ok to execute the command. the timer will then be set and begin to count down to zero. cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 11 of 14 20. the system set-up is now complete. once the countdown timer or date and time have been set, the integrated enerchip battery can be used to maintain the timer or real time by either disabling power from the dongle by clicking the rtc ec power button or removing the dongle from the usb port. in the absence of usb power, the enerchip will provide power to the pcf2123 rtc for up to 30 hours. simply re-insert the dongle or re-apply power to verify that the countdown timer or time and date were maintained while the dongle was not under usb power. rtc register access the pcf2123 registers are also accessible through the eval-12 gui. select the show rtc registers option to view and modify the rtc register settings as shown below. cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 12 of 14 from this window, click on the get registers box to reveal the bit settings. an example of the register map is shown in the following window. to adjust the registers, click on either the bit set or bit reset box in the lower left corner of the register map, window then click on the feld in one of the bit columns to set or reset, respectively, that register bit. when fnished setting the register felds, click the set register button in the lower right corner of the window. when fnished using the cbc-eval-12-34123, click the rtc ec power button in the main gui window to turn off power to the module. then click on the disconnect button and remove the usb dongle from the computer. cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 13 of 14 figure 4: cbc-eval-12-34123 enerchip rtc board circuit schematic. table 1: cbc-eval-12-34123 enerchip rtc board bill of materials. cbc-eval-12-34123 circuit schematic the schematic of figure 4 depicts the cbc-eval-12-34123 rtc board. for the purpose of supporting hardware development, cbc34123 package pins are accessible by way of through-hole vias 1-16 of j5 on the tab board. additional backup run time is supported by connecting external enerchips to the cbc34123 by way of through- hole vias 1-2 of j3. reference documents cbc34123 enerchip rtc data sheet: http://www.cymbet.com/pdfs/ds-72-31.pdf . pcf2123 nxp real-time clock data sheet: http://www.nxp.com/documents/data_sheet/pcf2123.pdf . crystal selection guide: um10301 - user manual for nxp real time clocks: http://www.nxp.com/documents/user_manual/um10301.pdf . cbc-eval-12-34123 enerchip rtc evaluation kit preliminary
?2013 cymbet corporation ? tel: +1-763-633-1780 ? www.cymbet.com ds-72-35 v0.7 page 14 of 14 figure 6: cbc-eval-12-34123 enerchip rtc board assembly diagram (bottom view). cbc-eval-12-34123 assembly diagrams figure 5: cbc-eval-12-34123 enerchip rtc board assembly diagram (top view). cymbet, the cymbet logo and enerchip are trademarks of cymbet corporation. all rights reserved. enerchip products and technology are covered by one or more patents or patents pending. disclaimer of warranties; as is the information provided in this data sheet is provided as is and cymbet corporation disclaims all representations or warranties of any kind, express or implied, relating to this data sheet and the cymbet battery product described herein, including without limitation, the implied warranties of merchantability, ftness for a particular purpose, non-infringement, title, or any warranties arising out of course of dealing, course of performance, or usage of trade. cymbet battery products are not approved for use in life critical applications. users shall confrm suitability of the cymbet battery product in any products or applications in which the cymbet battery product is adopted for use and are solely responsible for all legal, regulatory, and safety-related requirements concerning their products and applications and any use of the cymbet battery product described herein in any such product or applications. enerchip part number description notes CBC34123-M5C enerchip rtc spi 5uah 2123 5x5 qfn -20-70c tube cbc-eval-12-34123 enerchip rtc cbc34123 evaluation kit usb and rtc tab board cbc-tab-34123 enerchip eval-12 cbc34123 tab board ordering information cbc-eval-12-34123 enerchip rtc evaluation kit preliminary

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