5.4 Microcontroller Interface
Used in a typical system, the CC1021 device will interface to a microcontroller. This microcontroller must be able to:
- Program the CC1021 device into different modes via the 4-wire serial configuration interface (PDI, PDO, PCLK and PSEL)
- Interface to the bi-directional synchronous data signal interface (DIO and DCLK)
- Optionally, the microcontroller can do data encoding / decoding
- Optionally, the microcontroller can monitor the LOCK pin for frequency lock status, carrier sense status or other status information.
- Optionally, the microcontroller can read back the digital RSSI value and other status information via the 4-wire serial interface.