EM2420 ETC [List of Unclassifed Manufacturers], EM2420 Datasheet - Page 43

• Manufacturer Part Number: EM2420
• Description: 2.4 GHz IEEE 802.15.4 / ZigBee RF Transceiver
• Manufacturer: ETC [List of Unclassifed Manufacturers]

Figure 23. Radio control states
Ember Part Number: 120-0049-000C
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
RX_SFD_SEARCH
RX_CALIBRATE
SXOSCOFF
found
[49, 50 and 51]
[52, 53 and 54]
[3, 4, 5 and 6]
SFD
SRFOFF
RX_FRAME
[16 and 40]
[2 and 40]
TX_ACK
[48]
EM2420 Datasheet
Wait for the specified crystal oscillator
XOSC16M_STABLE status bit
Wait until voltage regulator
start-up time, or poll the
Voltage Regulator Off
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
EM2420
periods later
All RX states
Page 43 of 89
Preamble and SFD
TXFIFO Data
is transmitted
is transmitted