參數(shù)資料
型號： EM2420TR
廠商： Electronic Theatre Controls, Inc.
英文描述： 2.4 GHz IEEE 802.15.4 / ZigBee RF Transceiver
中文描述： 2.4 GHz IEEE 802.15.4標(biāo)準(zhǔn)/ ZigBee的射頻收發(fā)器
文件頁數(shù)： 68/89頁
文件大?。?/td> 1758K
代理商： EM2420TR
EM2420
Ember Part Number: 120-0049-000
C
EM2420 Datasheet
Page 68 of 89
SYNCWORD (0x14) - Sync Word
Bit
Field Name
Reset
R/W
Description
15:0
SYNCWORD[15:0]
0xA70F
R/W
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
Reset
R/W
Description
15:14
TXMIXBUF_CUR[1:0]
1
R/W
TX mixer buffer bias current.
0: 690uA
1: 980uA (nominal)
2: 1.16mA
3: 1.44mA
13
TX_TURNAROUND
1
R/W
Sets the wait time after STXON before transmission is started.
0 : 8 symbol periods (128 us)
1 : 12 symbol periods (192 us)
12:11
TXMIX_CAP_ARRAY[1:0]
0
R/W
Selects varactor array settings in the transmit mixers.
10:9
TXMIX_CURRENT[1:0]
0
R/W
Transmit mixers current:
0: 1.72 mA
1: 1.88 mA
2: 2.05 mA
3: 2.21 mA
8:6
PA_CURRENT[2:0]
3
R/W
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
5
PA_DIFF
1
R/W
Indicates whether PA output is differential (1) or single-ended
(0).
4:0
PA_LEVEL[4:0]
31
R/W
Output PA level. (~0 dBm)
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