Development System MICRF505-MICRF620 User Manual
The development system provides hands-on experience with the MICRFXXX transceiver. The user can use the included firmware (the program used in the micro controller) and hardware, or make a new program and flash it into the micro controller. That is, the user can use the boards both to evaluate the MICRFXXX, and as an aid in the development of a radio communication system.
A separate PC program is available. Through this program, it is possible to set the programming word for the MICRFXXX (both the frequency dividers and the control bits can be set). This program is referred to as “RF TestBench”. Please observe: It is possible to read out the firmware version of the development boards via RF TestBench.
Main modes of operation of the development system:
• RF Test Modes. The user can test the RF properties of the transceiver. It is possible to transmit a 1010… pattern or a random pattern, transmit a carrier or to stay in receive mode, searching for a 1010… pattern. In addition, the user can select to bypass the MCU completely, and control the RF part via header pins.
• 2-way Link-Test Mode. In this mode of operation, one board is “Master” and another board is “Slave”. Messages (5 printable ascii characters) are transmitted back and forth between the two boards. This mode is useful when testing radio communication in different environments, testing antennas, testing encapsulation etc. 16-bit CRC is implemented. A LED (“LED1”) indicates link OK.
• Simple Byte Transfer Mode. In this mode, the user can enter a number of bytes into a development board. The board will then transmit the bytes. If no user-bytes are entered, the board will search for RF messages, and, if found, output the message to the user. 16-bit CRC is implemented (messages received through RF are only given to user if the CRC is OK). A 64-byte deep buffer is implemented for both RX and TX. Only 1 frequency is used.
• Advanced Byte Transfer Mode. In this mode of operation, one board is “Master” and another board is “Slave”. Operates like the “Simple Byte Transfer Mode”, except: When transmitting user data, the board will construct a frame by adding frame type, frame ID and sync info. Automatic frequency hopping is implemented. ARQ(Automatic Repeat reQuest), CRC and duplicate control are implemented as well. “Master” is responsible for maintaining the link (by transmitting “timestamps”). If “Slave” is reset or gets out of sync, it requests a “timestamp” from Master.
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