CC2420 Datasheet, PDF (66/92 Pages) List of Unclassifed Manufacturers – 2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver

CC2420
SYNCWORD (0x14) - Sync Word
Bit
15:0
Field Name
SYNCWORD[15:0]
Reset
R/W
0xA70F R/W
Description
Synchronisation 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 synchronisation). In reception an implicit
zero is required before the first symbol required by SYNCWORD.
The reset value is compliant with IEEE 802.15.4.
TXCTRL (0x15) - Transmit Control Register
Bit
Field Name
15:14 TXMIXBUF_CUR[1:0]
Reset R/W
2
R/W
13
TX_TURNAROUND
1
R/W
12:11 TXMIX_CAP_ARRAY[1:0]
0
R/W
10:9 TXMIX_CURRENT[1:0] 0
R/W
8:6
PA_CURRENT[2:0]
3
R/W
5
-
4:0
PA_LEVEL[4:0]
1
W1
31
R/W
Description
TX mixer buffer bias current.
0: 690uA
1: 980uA
2: 1.16mA (nominal)
3: 1.44mA
Sets the wait time after STXON before transmission is started.
0 : 8 symbol periods (128 us)
1 : 12 symbol periods (192 us)
Selects varactor array settings in the transmit mixers.
Transmit mixers current:
0: 1.72 mA
1: 1.88 mA
2: 2.05 mA
3: 2.21 mA
Current programming of the PA
0: -3 current adjustment
1: -2 current adjustment
2: -1 current adjustment
3: Nominal setting
4: +1 current adjustment
5: +2 current adjustment
6: +3 current adjustment
7: +4 current adjustment
Reserved, write as 1.
Output PA level. (~0 dBm)
SWRS041B
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