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參數(shù)資料
| 型號： | CC2420 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver |
| 中文描述： | 2.4 GHz IEEE 802.15.4標準/ ZigBee功能的RF收發(fā)器 |
| 文件頁數(shù)： | 47/87頁 |
| 文件大?。?/td> | 1418K |
| 代理商： | CC2420 |
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SmartRF
CC2420
above. The only differences are from the
requirements in [1] for CCM.
Timing
Table 8 shows some examples of the time
used by the security module for different
operations.
Mode
l(a)
l(m)
l(MIC)
Time
[us]
CCM
50
69
8
222
CTR
-
15
-
99
CBC
17
98
12
99
Stand-
alone
-
16
-
14
Table 8. Security timing examples
Linear IF and AGC Settings
CC2420
is based on a linear IF chain
where the signal amplification is done in
an analog VGA (variable gain amplifier).
The gain of the VGA is digitally controlled.
The AGC (Automatic Gain Control) loop
ensures that the ADC operates inside its
dynamic range by using an analog/digital
feedback loop.
The AGC characteristics are set through
the
AGCCTRL
,
AGCTST0
,
AGCTST1
and
AGCTST2
registers. The reset values
should be used for all AGC control and
test registers.
RSSI / Energy Detection
CC2420
has a built-in RSSI (Received
Signal Strength Indicator) giving a digital
value that can be read form the 8 bit,
signed 2’s complement
RSSI.RSSI_VAL
register.
The RSSI value is always averaged over 8
symbol periods (128 μs), in accordance
with [1]. The
RSSI_VALID
status bit
(Table 5) indicates when the RSSI value is
valid, meaning that the receiver has been
enabled for at least 8 symbol periods.
The RSSI register value
RSSI.RSSI_VAL
can be referred to the power P at the RF
pins by using the following equations:
P =
RSSI_VAL
+
RSSI_OFFSET
[dBm]
where
empirically during system development
from the front end gain.
RSSI_OFFSET
is
approximately –45. E.g. if reading a value
of –20 from the
RSSI
register, the RF
input power is approximately –65 dBm.
the
RSSI_OFFSET
is
found
A typical plot of the
RSSI_VAL
reading as
function of input power is shown in Figure
26. It can be seen from the figure that the
RSSI reading from
CC2420
is very linear
and has a dynamic range of about 100 dB.
Chipcon AS
SmartRF
CC2420 Preliminary Datasheet (rev 1.2), 2004-06-09
Page 47 of 87
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CC2420/T&R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver |
| CC2420/TR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver |
| CC2420DBK | 功能描述:Zigbee/802.15.4開發(fā)工具 CC2420 DEMO KIT 2 DEMO BOARDS RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓: |
| CC2420DK | 功能描述:Zigbee/802.15.4開發(fā)工具 CC2420 DEVELOPMENT KIT RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓: |
| CC2420EMK | 功能描述:Zigbee/802.15.4開發(fā)工具 CC2420 EVALUATION KT (2)PCBs & (2)ANTENNA RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓: |
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