EM2420-STR Ember, EM2420-STR Datasheet - Page 30

• Manufacturer Part Number: EM2420-STR
• Description: IC RF TXRX ZIGBEE 2.4GHZ 48-QLP
• Manufacturer: Ember

Specifications of EM2420-STR

• Mfg Application Notes: EM2420
• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4
• Applications: ZigBee™
• Power - Output: -3dBm
• Sensitivity: -94dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 19.7mA
• Current - Transmitting: 17.4mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-QLP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Memory Size: -

issued twice to ensure that the SFD pin
goes back to its idle state.
For security enabled frames, the MAC
layer must read the source address of the
received frame before it can decide which
key to use to decrypt or authenticate. This
data must therefore not be overwritten
even if it has been read out of the RXFIFO
Address
recognition OK
Address
recognition fails
Ember Part Number: 120-0049-000D
FIFOP
SCLK
FIFO
CSn
SFD
SO
higher than frame length
lower than frame length
SI
FIFOP Pin, if threshold
FIFOP Pin, if threshold
Data received over RF
Data received over RF
ADDR
FIFOP Pin
Status
FIFO Pin
FIFO Pin
SFD Pin
SFD Pin
TXFIFO
Figure 12. Example of pin activity when reading RXFIFO.
Length
-
Figure 11. Pin activity examples during receive
Preamble
Preamble
PSDU0
-
PSDU1
SFD Length
SFD Length
-
EM2420 Datasheet
PSDU2
-
by
SECCTRL0.RXFIFO_PROTECTION control
bit is set, the
frame header of security enabled frames
until decryption has been performed. If no
MAC
implemented outside the
may be cleared to achieve optimal use of
the RXFIFO.
MAC Protocol Data Unit (MPDU) with correct address
MAC Protocol Data Unit (MPDU) with wrong address
PSDU3
-
the
security
PSDU4
-
microcontroller.
EM2420
is
PSDU5
-
used
EM2420
also protects the
EM2420
RSSI
-
or
Page 30 of 84
if
, this bit
If
FCS/Corr
-
it
the
is