CC2420Z-RTR1 datasheet(44/92 Pages) TI

44 / 92 page

CC2420

SWRS041B

Page 44 of 89

Wait for the specified crystal oscillator

start-up time, or poll the

XOSC16M_STABLE status bit

Power Down (PD)

[0]

SXOSCON

IDLE

[1]

Wait until voltage regulator

has powered up

Voltage Regulator Off

VREG_EN

set low

VREG_EN

set high

Chip Reset

(pin or register)

All States

SXOSCOFF

command strobe

All States

except Power Down (PD)

SRFOFF

TX_CALIBRATE

[32]

All RX states

TX_PREAMBLE

[34, 35 and 36]

8 or 12 symbol

periods later

Preamble and SFD

is transmitted

TX_FRAME

[37, 38 and 39]

TXFIFO Data

is transmitted

RX_CALIBRATE

[2 and 40]

RX_SFD_SEARCH

[3, 4, 5 and 6]

RX_FRAME

[16 and 40]

12 symbol periods

later

SFD

found

Frame received or

failed address

recognition

Automatic or manual

acknowledge request

TX_ACK_CALIBRATE

[48]

12 symbol

periods later

TX_ACK_PREAMBLE

[49, 50 and 51]

TX_ACK

[52, 53 and 54]

Acknowledge

completed

RX_OVERFLOW

[17]

Crystal oscillator disabled,

FIFO / RAM access disabled

RX_WAIT

[14]

TX_UNDERFLOW

[56]

erf

low

Underflow

SFLU

SHRX

The transition from

TX_UNDERFLOW to

RX_CALIBRATE is automatic,

but SFLUSHTX must be used to

reset underflow indication

Figure 25. Radio control states

CC2420Z-RTR1 Datasheet(PDF) 44 Page - Texas Instruments

CC2420Z-RTR1 Datasheet(HTML) 44 Page - Texas Instruments

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