CC2550-RTY1 datasheet(25/62 Pages) TI2

25 / 62 page

CC2550

SWRS039B

Page 25 of 58

Radio Control

19,20

IDLE

CALIBRATE

MANCAL

3,4,5

SETTLING

9,10,11

TX_UNDERFLOW

FSTXON

SFSTXON

FS_AUTOCAL = 00 | 10 | 11

STX | SFSTXON

STX

TXFIFO_UNDERFLOW

SFTX

SIDLE

SCAL

CAL_COMPLETE

FS_AUTOCAL = 01

STX | SFSTXON

CAL_COMPLETE

CALIBRATE

IDLE

TXOFF_MODE = 00

FS_AUTOCAL = 10 | 11

TXOFF_MODE = 00

FS_AUTOCAL = 00 | 01

TXOFF_MODE = 10

FS_WAKEUP

6,7

STX | SFSTXON

SLEEP

SPWD

XOFF

SXOFF

CSn = 0

TXOFF_MODE = 01

Figure 13: Complete Radio Control State Diagram

CC2550 has a built-in state machine that is

used to switch between different operation

states (modes). The change of state is done

either by using command strobes or by

internal events such as TX FIFO underflow.

A simplified state diagram, together with

typical usage and current consumption, is

shown in Figure 4 on page 13. The complete

radio control state diagram is shown in Figure

13. The numbers refer to the state number

readable in the MARCSTATE status register.

This register is primarily for test purposes.

16.1

Power-On Start-Up Sequence

When the power supply is turned on, the

system must be reset. One of the following two

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