C8051F411-EK
Rev. 0.1
5
Press the UP and DOWN buttons to set the year. The valid range is 2000 to 2136. After setting the year, press
SELECT to set the month. This will appear as:
M 00
Press the UP and DOWN buttons to change the month. After setting the year, press SELECT to set the day. This
will appear as:
D 00
Pressing SELECT will set the date, and the device will go back to Keepsake mode. Pressing MENU will cancel the
operation and go back to Keepsake mode.
4.1.4. TEMP
In this menu option, the temperature offset can be calibrated. The temperature calibration is done in Celsius. In this
option, the lower part of the LCD screen will appear as:
25 deg C
Use the UP and DOWN buttons to change this value to the current room temperature for calibration. Press
SELECT to calibrate the device, or press MENU to cancel temperature calibration.
4.1.5. FAH-CEL
In this menu option, the LCD can be changed to display the temperature in Celsius or Fahrenheit. Use the UP and
DOWN keys to move between CELSIUS and FAHREN. Press SELECT to change the display, or press MENU to
go back to Keepsake mode.
4.1.6. 12/24 HR
In this menu option, the LCD can be changed to display the time in 12 or 24 hour format. Use the UP and DOWN
keys to move between 12 HOUR and 24 HOUR. Press SELECT to change the display, or press MENU to go back
to Keepsake mode.
4.2. Demo Mode
To put the device in Demo mode, use the Keepsake menu options as described in “4.1.1. DEMO”. Demo mode
should only be used when the board is powered from the USB bus (the red switch is in the right position). In Demo
mode, the user can configure the system clock speed and the core voltage. The default settings for demo mode
are 3 MHz and a core voltage of 2.5 V.
In Demo mode, the LCD displays:
Time (in the upper right hand corner of the LCD)
Core Voltage (in the lower section of the LCD)
System Clock Speed (in the lower section of the LCD)
Temperature (in the lower section of the LCD)
The time is persistent in the upper right-hand corner. The core voltage, system clock speed, and temperature will
be alternately displayed in the lower section of the LCD.
The system clock speed and core voltage can be configured from the Demo mode menu. Press the MENU button
to bring up the menu. Use the UP and DOWN buttons to cycle through the options. Pressing the MENU button at
any time will bring the display back to the default Demo mode from Menu mode. The menu options in Demo mode
are as follows:
SET MHZ
SETVREG
KEEP
Press the SELECT button to choose one of the menu options. The options are summarized in Figure 4.
