CC2430 Datasheet, PDF (207/234 Pages) Texas Instruments – A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigBee-TM

CC2430
Bit Name
7:0 CCA_THR[7:0]
Reset R/W Description
0xE0
R/W
Clear Channel Assessment threshold value, signed number
in 2’s complement for comparison with the RSSI.
The unit is 1 dB, offset is TBD [depends on the absolute
gain of the RX chain, including external components and
should be measured]. The CCA signal goes high when the
received signal is below this value.
The reset value is in the range of -70 dBm.
Table 50: Register RSSIH (0xDF06)
Bit Name
Reset R/W Description
7:0 RSSI_VAL[7:0]
0x00 R
RSSI estimate on a logarithmic scale, signed numbern 2’s
complement.
Unit is 1 dB, offset is TBD [depends on the absolute gain of
the RX chain, including external components, and should
be measured]. The RSSI value is averaged over 8 symbol
periods.
Table 51: Register RSSIL (0xDF07)
Bit Name
Reset R/W Description
7:0
SYNCWORD[15:8]
0xA7
R/W
Synchronization word. The SYNCWORD is processed from
the least significant nibble (F at reset) to the most significant
nibble (A at reset).
SYNCWORD is used both during modulation (where 0xF’s
are replaced with 0x0’s) and during demodulation (where
0xF’s are not required for frame synchronization). In
reception an implicit zero is required before the first symbol
required by SYNCWORD.
The reset value is compliant with IEEE 802.15.4.
Table 52: Register SYNCWORDH (0xDF08)
Bit Name
Reset R/W Description
7:0
SYNCWORD[7:0]
0x0F
R/W
Synchronization word. The SYNCWORD is processed from
the least significant nibble (F at reset) to the most significant
nibble (A at reset).
SYNCWORD is used both during modulation (where 0xF’s
are replaced with 0x0’s) and during demodulation (where
0xF’s are not required for frame synchronization). In
reception an implicit zero is required before the first symbol
required by SYNCWORD.
The reset value is compliant with IEEE 802.15.4.
Table 53: Register SYNCWORDL (0xDF09)
CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A
Page 207 of 232