CC2420 Chipcon AS, CC2420 Datasheet - Page 40

• Manufacturer Part Number: CC2420
• Description: 2.4 GHz RF Transceiver for IEEE 802.15.4 and ZigBee
• Manufacturer: Chipcon AS

Chipcon AS SmartRF ® CC2420 Preliminary Datasheet (rev 1.0), 2003-11-17
RX_WAIT
[14]
except IDLE
All States
All States
acknowledge request
Automatic or manual
12 symbol periods
periods later
later
12 symbol
command strobe
TX_ACK_CALIBRATE
TX_ACK_PREAMBLE
Figure 23. Radio control states
RX_SFD_SEARCH
RX_CALIBRATE
SXOSCOFF
[49, 50 and 51]
[52, 53 and 54]
found
[3, 4, 5 and 6]
SFD
SRFOFF
RX_FRAME
[16 and 40]
[2 and 40]
TX_ACK
[48]
Wait for the specified crystal oscillator
XOSC16M_STABLE status bit
Wait until voltage regulator
start-up time, or poll the
Voltage Regulator Off
SmartRF
has powered up
Acknowledge
XOSC_ON
completed
IDLE
[0]
[1]
VREG_EN set high
Chip Reset
(pin or register)
SXOSCON
TX_CALIBRATE
TX_PREAMBLE
[34, 35 and 36]
[37, 38 and 39]
Crystal oscillator disabled,
register access enabled,
FIFO / RAM access disabled
TX_FRAME
®
[32]
VREG_EN set low
8 or 12 symbol
CC2420
periods later
All RX states
Page 40 of 85
Preamble and SFD
TXFIFO Data
is transmitted
is transmitted