Preliminary
CBC-EVAL-12-34813
CBC34813 Real-Time Clock with Integrated Backup Power
EnerChip™ RTC Evaluation Kit
System Features and Overview
CBC-EVAL-12-34813 is a demonstration kit featuring
the Cymbet CBC34813 EnerChip RTC - an integrated
surface mount device combining an Ambiq Micro
AM0813 Real-Time Clock (RTC), power management
circuit, and solid state rechargeable EnerChip
providing up to 100 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-12-34813 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 shows the USB Interface Board to the left, and
the CBC34813 EnerChip RTC Tab Board to the right.
Figure 2: CBC-EVAL-12-34813 Demo Kit.
EVAL-12 Graphical User Interface
•
•
The CBC-EVAL-12-34813 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 modification. 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 CBC34813
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 CBC34813
5mm x 5mm QFN package on the CBC34813 Tab Board.
Graphical User Interface
for Easy Application
Development!
Smallest RTC Power Backup Footprint
The block diagram of Figure 1 illustrates the CBC-
EVAL-12-34813, an extremely compact low power
RTC with integrated backup power source.
Cymbet EnerChip and
Power Management
Solid state backup power
source with integrated
power management
CBC34813
EnerChip RTC
AM0813
Real-Time Clock
5-pin computer
interface to
CBC34813
USB interface
circuit and
connector
Figure 1: CBC-EVAL-12-34813 Block Diagram.
DS-72-39 V0.6
Full Access to RTC
Registers!
©2013 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
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CBC-EVAL-12-34813 EnerChip CC RTC Evaluation Kit
Getting Started
BEFORE inserting the USB dongle into the USB port, proceed with the file downloads as described below.
For first time users who have not installed the demonstration software, follow these steps:
1. Download the CBC-EVAL-12-34813 files 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.’
DS-72-39 V0.6
©2013 Cymbet Corporation • Tel: +1-763-633-1780 • www.cymbet.com
Page 3 of 14
PCB设计
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