CC2420 Chipcon AS, CC2420 Datasheet - Page 36

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

mode.
mode until transmission is turned off
manually.
In
(MDMCTRL1.RX_MODE=1)
Address Recognition
CC2420
address recognition, as specified in [1].
Hardware address recognition may be
enabled
MDMCTRL0.ADR_DECODE control bit.
Address recognition is based on the
following requirements, listed from section
7.5.6.2 in [1]:
Chipcon AS SmartRF ® CC2420 Preliminary Datasheet (rev 1.0), 2003-11-17
FIFO (from
Incoming / outgoing
•
•
•
•
FIFO (from uC)
CC2420
Transmit mode:
Receive mode:
The frame type subfield shall not
contain an illegal frame type
If the frame type indicates that the
frame is a beacon frame, the
source PAN identifier shall match
macPANId unless macPANId is
equal to 0xFFFF, in which case
the
accepted regardless of the source
PAN identifier.
If a destination PAN identifier is
included in the frame, it shall
match macPANId or shall be the
broadcast
(0xFFFF).
If a short destination address is
included in the frame, it shall
includes hardware support for
serial
/
beacon
RF data
CC2420
will remain in serial transmit
FIFOP
FIFOP
disabled
)
receive
Figure 20. Un-buffered test mode, pin activity
PAN
frame
Preamble
using
shall
identifier
mode
byte
the
be
SmartRF
SFD
4 us
b0
synchronisation is still performed by
CC2420
pin will remain idle low until a start of
frame delimiter has been detected.
If any of the above requirements are not
satisfied
enabled,
incoming frame and flush the data from
the RXFIFO. Only data from the rejected
frame is flushed, data from previously
accepted frames may still be in the
RXFIFO.
Incoming frames with reserved frame
types (FCF frame type subfield is 4, 5, 6 or
7)
RESERVED_FRAME_MODE control bit in
MDMCTRL0 is set. In this case, no further
address recognition is performed on these
b1
•
b2
is
b3
. This means that the FIFOP clock
match either macShortAddress or
the broadcast address (0xFFFF).
Otherwise
destination address is included in
the
aExtendedAddress.
If only source addressing fields
are included in a data or MAC
command frame, the frame shall
only be accepted if the device is a
PAN coordinator and the source
PAN
macPANId.
b4
however
and
CC2420
b5
s0
b6
frame,
b7
address
®
b8
identifier
b9
will
if
accepted
s1
b10 b11
it
CC2420
an
disregard
recognition
shall
b8
b9
b0
Page 36 of 85
s2
b10 b11
extended
b1
matches
if
b2
match
b3
the
the
b4
is