1172 datasheet(13/50 Pages) TI

13 / 50 page

CC1150

Preliminary Data Sheet (rev. 1.0.)

SWRS037

Page 13 of 49

16 Configuration Software

CC1150 can be configured using the SmartRF

Studio software, available for download from

http://www.chipcon.com. The SmartRF Studio

software is highly recommended for obtaining

optimum register settings, and for evaluating

performance and functionality. A screenshot of

the SmartRF Studio user interface for CC1150

shown

Figure

Figure 5: SmartRF Studio user interface

17 4-wire Serial Configuration and Data Interface

CC1150 is configured via a simple 4-wire SPI-

compatible interface (SI, SO, SCLK and CSn)

where CC1150 is the slave. This interface is

also used to read and write buffered data. All

address and data transfer on the SPI interface

is done most significant bit first.

All transactions on the SPI interface start with

a header byte containing a read/write bit, a

burst access bit and a 6-bit address.

During address and data transfer, the CSn pin

(Chip Select, active low) must be kept low. If

CSn

goes high during the access, the transfer

will be cancelled.

When CSn goes low, the MCU must wait until

the CC1150 SO pin goes low before starting to

transfer the header byte. This indicates that

the voltage regulator has stabilized and the

crystal is running. Unless the chip was in the

SLEEP or XOFF states, the SO pin will always

go low immediately after taking CSn low.

17.1 Chip Status Byte

When the header byte is sent on the SPI

interface, the chip status byte is sent by the

CC1150 on the SO pin. The status byte contains

key status signals, useful for the MCU. The

first bit, s7, is the CHIP_RDYn signal; this

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