Renesas ISL12024 User Manual

Real Time Clock USB
Real Time Clock USB Evaluation System
Intersil RTC Devices Supported
WITH USER EEPROM
ISL12024 ISL1208
ISL12025 ISL12008
ISL12026/26A ISL1209
ISL12027/27A ISL1218
ISL12028/28A ISL1219
ISL12029/29A ISL1220
ISL1221
ISL12022
Introduction
This evaluation system is a hardware and software platform
for testing Intersil Real Time Clock (RTC) devices, and the
system requires only a PC for the controller and power
functions. Intersil offers a large portfolio of RTC devices, with
features including a crystal oscillator, clock and date counters,
auto switch-over to battery backup, voltage monitoring with
low voltage reset, a watchdog timer, and alarms. The
ISL1209/19/21/32 devices include an event-detection
feature, and all but the ISL1209 include a time stamp function
for recording the time of the event. The ISL12022 features an
on-chip temperature sensor and temperature compensation,
while the ISL12020M/22M/22MA devices are RTC modules
with internal crystals. These module versions are factory
calibrated to account for crystal variability, and the on-chip
temperature sensor enables automatic crystal temperature
compensation, for the best RTC accuracy over temperature.
The evaluation system enables users to test all of these
functions, and to evaluate device performance criteria, such as
long-term clock accuracy. Hardware options, such as battery
and crystal types, can also be tested. The software sets up
easily, and enables evaluation of all major RTC functions. The
hardware's two-piece construction - utilizing a motherboard
and a daughterboard - allows the evaluation of multiple RTC
products simply by switching out small daughterboards.
Operation and Overview of the
RTC Evaluation Board
Connections
The evaluation board consists of a motherboard and
daughterboard which connect together via J1 and J2. The
hardware uses a USB connection to communicate with the PC
loaded software, and USB drivers must be installed on the PC.
The provided USB cable, with type A and B connectors, is
required to hook up the board to a PC. The cable should be
connected to the PC first and then to the evaluation board.
Once connected, you will hear the USB "enumeration" tone,
and the motherboard "POWER" LED illuminates, indicating
that the USB connection is providing the +5V power.
AN1745 Rev 2.00
October 9, 2013
NO USER EEPROM
ISL12020M
ISL12022M
ISL12022MA
ISL12032
ISL12057
ISL12058
ISL12059
ISL12082
USER'S MANUAL
Powering Down
The motherboard contains backup power sources, either a
supercap or an optional battery, so the RTC might operate off a
backup source when V powers down. If the user wishes to
DD
totally power down the RTC device (e.g., a hard reset), either
disconnect the daughterboard from the motherboard or
connect motherboard jumper J4 to the "GND" position to
eliminate the backup sources. There is a 0.1µF V
capacitor on the daughterboard, which must discharge fully
before the RTC device stops operating. This discharge time can
be up to one second when using a V
powered down, the RTC board cannot be monitored by the RTC
evaluation software.
Installing the RTC Software and USB Drivers
• Note: If you have previously loaded the Intersil RTC
evaluation software on the PC, you need to uninstall the
previously loaded version of the Intersil RTC Evaluation
software on the PC, Navigate to the uninstall program "All
Programs > Intersil > RTC_EVAL > RTC_uninstall" and run it.
If the uninstall program did not delete the old desktop
shortcut (right click on icon, then "delete"). Last you need to
uninstall the USB drivers before running the following install.
Go to Device Manager, (Control Panel, System, Hardware)
with the Eval board plugged in. Locate the "USBXpress
Device" under the "Universal Serial Bus controllers" branch
and then right click and select the "Uninstall".
• Download the appropriate Installation program from the
Web. The same installation file is used for all Intersil RTC
Products, but changes for the Windows Version your
computer is running. The basic link to these installers is:
http://www.intersil.com/content/dam/Intersil/documents/
rtc_/ (add Web File name from below) or go to the products
main page and select the "Documents" tab.
• For Windows 2000 the Web File name is
"RTC_EVAL_Installer_w2k_V405.exe"
• For Windows XP & WIN7 the Web File name is
"RTC_EVAL_Installer_V405.exe"
• For Windows 8, the Web File name is
"RTC_EVAL_Installer_Win8_V405.exe"
• WIN8 Note: Before running the WIN8 installer there is a pre-
installation document on the Web that must be followed.
File name is
RTC_WIN8_Preinstallation_Procedure_081613.PDF.
Download this file, open it and follow the procedure.
• Do not plug in the RTC USB evaluation board yet.
• Double click on "RTC_EVAL_Installer...".
• Click "Next".
• If you agree with the license conditions, click "I accept" in
the license window, then click "Next" to install.
• Select a "Destination Location", and click "Next".
• Select a "Start Menu Folder", and click "Next".
• Click on "Create a Desktop Icon" and click "Next".
AN1745
Rev 2.00
October 9, 2013
decoupling
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of 5V. Note that when
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