CC1150-RTY1 datasheet(18/67 Pages) TI

18 / 67 page

CC1150

SWRS037A

Page 18 of 60

Figure 8: SmartRF Studio User Interface

10 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. The timing for the address

and data transfer on the SPI interface is shown

in Figure 9 with reference to Table 15.

When CSn is pulled 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 is in the

SLEEP or XOFF states, the SO pin will always

go low immediately after taking CSn low.

CC1150-RTY1 Folha de dados(PDF) 18 Page - Texas Instruments