參數(shù)資料
型號(hào)： 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(yè)數(shù)： 46/89頁(yè)
文件大小： 1758K
代理商： EM2420TR
EM2420
Ember Part Number: 120-0049-000
C
EM2420 Datasheet
Page 46 of 89
Issue a
SRXDEC
command strobe. The
first frame in the RXFIFO is then
decrypted / authenticated as set by
the current security mode.
RX in-line security operations are always
performed on the first frame currently
inside the RXFIFO, even if part of this has
already been read out over the SPI
interface. This allows the receiver to first
read the source address out to decide
which
key
to
use
authentication of the complete frame. In
CTR or CCM mode it is of course
important that bytes to be decrypted are
not read out before the security operation
is started.
before
doing
When the
SRXDEC
command strobe is
issued, the
FIFO
and
FIFOP
pins will go
low.
This
is
to
microcontroller that no further data may be
read out before the next byte to be read
has undergone the requested security
operation.
indicate
to
the
The frame in the RXFIFO may be received
over RF or it may be written into the
RXFIFO over the SPI interface for
debugging
or
higher
operations.
layer
security
CTR mode encryption / decryption
CTR mode encryption / decryption is
performed by the
EM2420
on MAC frames
within the TXFIFO / RXFIFO respectively.
SECCTRL1.SEC_TXL
/
SEC_RXL
sets the
number of bytes between the length field
and the first byte to be encrypted /
decrypted respectively. This controls the
number of plaintext bytes in the current
frame.
For
IEEE
encryption, only the MAC payload (see
Figure 15 on page 34) should be
encrypted, so
SEC_TXL
/
SEC_RXL
is set
to 3 + (0 to 20) depending on the address
information in the current frame.
802.15.4
MAC
When encryption is initiated, the plaintext
in the TXFIFO is then encrypted as
specified by [1]. The encryption module
will encrypt all the plaintext currently
available, and wait if not everything is
prebuffered. The encryption operation may
also be started without any data in the
TXFIFO at all, and data will be encrypted
as it is written to the TXFIFO.
When decryption is initiated with a
SRXDEC
command strobe, the ciphertext
of the RXFIFO is then decrypted as
specified by [1].
CBC-MAC
CBC-MAC
provided by the
EM2420
hardware.
in-line
authentication
is
SECCTRL0.SEC_M
sets the MIC length M,
encoded as (M-2)/2.
When enabling CBC-MAC in-line TXFIFO
authentication, the generated MIC is
written to the TXFIFO for transmission.
The frame length must include the MIC.
SECCTRL1.SEC_TXL
/
SEC_RXL
sets the
number of bytes between the length field
and the first byte to be authenticated,
normally set to 0 for MAC authentication.
SECCTRL0.SEC_CBC_HEAD
defines if the
authentication length is used as the first
byte of data to be authenticated or not.
This bit should be set for compliance with
[1].
When enabling CBC-MAC in-line RXFIFO
authentication, the generated MIC is
compared to the MIC in the RXFIFO. The
last byte of the MIC is replaced in the
RXFIFO with:
0x00 if the MIC is correct
0xFF if the MIC is incorrect
The other bytes in the MIC are left
unchanged in the RXFIFO.
CCM
CCM combines CTR mode encryption and
CBC-MAC authentication in one operation.
CCM is described in [3].
SECCTRL1.SEC_TXL
/
SEC_RXL
sets the
number of bytes after the length field to be
authenticated but not encrypted.
The MIC is generated and verified very
much like with CBC-MAC described
相關(guān)PDF資料
PDF描述
EM3-DINAV23CO Energy Management Energy Meter with plug-in Output Modules
EM3-DINAV23CR Energy Management Energy Meter with plug-in Output Modules
EM3-DINAV23CX Energy Management Energy Meter with plug-in Output Modules
EM3-DINAV23DO Energy Management Energy Meter with plug-in Output Modules
EM3-DINAV23DR Energy Management Energy Meter with plug-in Output Modules
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EM242302 功能描述:柵欄接線端子 EURO MC421-38102 TERM RoHS:否 制造商:TE Connectivity / AMP 產(chǎn)品:Barrier Terminal Blocks 系列: 類型:Dual Barrier, Flat Block without Mounting Ears 節(jié)距:9.53 mm 位置/觸點(diǎn)數(shù)量:2 線規(guī)量程:22-12 電流額定值:20 A 電壓額定值:300 V 安裝風(fēng)格:Through Hole 安裝角:Vertical 端接類型:Screw 觸點(diǎn)電鍍:Tin
EM242303 功能描述:柵欄接線端子 EURO MC421-38103 TERM RoHS:否 制造商:TE Connectivity / AMP 產(chǎn)品:Barrier Terminal Blocks 系列: 類型:Dual Barrier, Flat Block without Mounting Ears 節(jié)距:9.53 mm 位置/觸點(diǎn)數(shù)量:2 線規(guī)量程:22-12 電流額定值:20 A 電壓額定值:300 V 安裝風(fēng)格:Through Hole 安裝角:Vertical 端接類型:Screw 觸點(diǎn)電鍍:Tin
EM242608H 功能描述:可插拔接線端子 EuroMag Pluggable Terminal Block RoHS:否 制造商:Phoenix Contact 產(chǎn)品:Plugs 系列:PTS 端接類型:Spring Cage 位置/觸點(diǎn)數(shù)量:5 線規(guī)量程:26-14 節(jié)距:5 mm 電流額定值:10 A 電壓額定值:250 V 安裝風(fēng)格: 安裝角: 觸點(diǎn)電鍍:
EM-24346-C36 功能描述:麥克風(fēng) 3.61 X 3.61 X 2.21MM -52 SENS, 12SL PORT RoHS:否 制造商:Knowles Acoustics 方向性:Omnidirectional 阻抗:4.4 K Ohms 工作電壓:0.9 V to 10 V 靈敏度:- 53 dB 端接類型:Wire Leads 長(zhǎng)度:5.56 mm 寬度:3.98 mm 深度:2.21 mm
EM-24346-D65 功能描述:100Hz ~ 10kHz Analog Microphone Electret Condenser 1.3V Omnidirectional (-52dB ±3dB @ 74dB SPL) Solder Pads 制造商:knowles 系列:EM 包裝:托盤 零件狀態(tài):有效 類型:駐極體電容 輸出類型:模擬 方向:全向 頻率范圍:100Hz ~ 10kHz 靈敏度:-52dB ±3dB @ 74dB SPL 信噪比:- 阻抗:4.4 千歐 電壓 - 額定:1.3V 電壓范圍:0.9 ~ 3V 電流 - 電源:50μA 端口位置:側(cè)面 密封等級(jí):無 端接:焊盤 大小/尺寸:3.57mm 長(zhǎng) x 3.57mm 寬 高度（最大值）:2.21mm 形狀:方形 標(biāo)準(zhǔn)包裝:25
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*