CC2400 Chipcon AS, CC2400 Datasheet - Page 36

• Manufacturer Part Number: CC2400
• Description: 2.4 GHz RF Transceiver
• Manufacturer: Chipcon AS

Hardware interface
In the buffered mode the PKT pin can be
used as an interrupt output to assist the
microcontroller
transmission
packets.
The PKT pin can be programmed to give
an interrupt when the synthesizer has
locked and is ready to receive / transmit a
data packet. Receive mode or transmit
mode can then be activated.
Chipcon AS
PKT in RX:
PKT in TX:
a)
b)
c)
d)
SmartRF
and
a
e
Starting FS calibration.
FS in lock. RX can now be turned on.
Sync word found. Receiving data.
Last byte received.
in
®
reception
CC2400 PRELIMINARY Datasheet (rev. 1.1), 2003-10-02
b
f
supervising
Figure 18. PKT pin timing diagram
of
c
data
the
SmartRF
e)
f)
g)
h)
In receive mode there will be an interrupt
when the synchronization word is found.
Incoming data will then be written to the
FIFO.
In transmit mode there will be an interrupt
when the FIFO has run empty, the two
CRC bytes have been transmitted and the
transmitter has been turned off.
The PKT pin activity is illustrated in Figure
18.
The polarity of the interrupt signal is set by
the INT.PKT_POLARITY bit.
Starting FS calibration.
FS in lock. TX can now be turned on.
FIFO empty, send CRC if
applicable, and turn of RF.
RF turned off.
d
g
®
h
CC2400
Page 36 of 73