Wireless Security Remote Control Development Kit User’s Guide
FIGURE 2-1:
PLUG THE SX1239 RECEIVER PICtail™ DAUGHTER CARD
INTO THE EMBEDDED SECURITY DEVELOPMENT BOARD
5. Power-up the Embedded Security Development Board.
To power the Embedded Security Development Board from the USB port, connect the
USB A to mini-B cable to the development board and an available USB port or USB
power source. Set jumper J6 to pins 1-2. When using a USB port for power, there is no
requirement to load the USB drivers.
To power the Embedded Security Development Board from an external power supply,
connect test points labeled +VEXT and GND to a bench power supply set to 3.3 VDC.
Place jumper J6 to pins 2-3.
2.5
DEMO OPERATION
The pre-programmed demo is used to demonstrate the basic operation of Microchip
Remote Keyless Entry (RKE) solutions. The demo highlights capabilities of transmitting
®
and receiving data that is secured over the air. Two different methods, KEELOQ Classic
®
and KEELOQ AES, are used in this demo.
2.5.1
Key Fob as Transmitter
The pre-programmed demonstration shows how to secure information during data
transmission. Pressing any one of four buttons on the red key fob, the information
about the pressed button will be encrypted and transmitted. When data is being
transmitted, the LED on the key fob will flash. Two ways to secure the information have
been shown in this demo: KEELOQ Classic and KEELOQ AES. When button 1 or 2 (see
Figure 2-2) is pressed, the information is secured with KEELOQ Classic before the
transmission; when button 3 or 4 (see Figure 2-2) is pressed, the information is secured
with KEELOQ AES before the transmission.
For details on KEELOQ Classic and KEELOQ AES, please refer to Microchip application
®
notes AN1259, “KEELOQ Microcontroller-Based Code Hopping Encoder” and AN1265
®
“KEELOQ with AES Microcontroller-Based Code Hopping Encoder”.
The key fob has four push buttons and is powered by a CR2032 coin battery. The key
fob is shown in Figure 2-2, where the four buttons are labeled individually.
DS41646A-page 16
2012 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
