- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45377 > MJ80C31U-36:D (ATMEL CORP) MICROCONTROLLER PDF資料下載
參數(shù)資料
| 型號： | MJ80C31U-36:D |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MICROCONTROLLER |
| 文件頁數(shù)： | 57/101頁 |
| 文件大小： | 3398K |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁當前第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁
82
8168C-MCU Wireless-02/10
AT86RF212
6.5 Energy Detection (ED)
The Energy Detection (ED) module is characterized by:
a dynamic range of 87 dB
a resolution of about 1 dB
a measurement time of 8 symbol periods for IEEE 802.15.4 compliant data rates
6.5.1 Overview
The receiver ED measurement (ED scan procedure) can be used as a part of a channel
selection algorithm. It is an estimation of the received signal power within the bandwidth
of an IEEE 802.15.4 channel. No attempt is made to identify or decode signals on the
channel. The ED value is calculated by averaging RSSI values over 8 symbol periods,
with the exception of the High Data Rate Modes (refer to section 7.1.4).
6.5.2 Measurement Description
There are two ways to initiate an ED measurement,
manually by writing an arbitrary value to register 0x07 (PHY_ED_LEVEL), or
automatically after detection of a valid SHR of an incoming frame.
Manually:
For manually initiated ED measurements, the radio transceiver needs to be
either in the state RX_ON or BUSY_RX. The end of the ED measurement time
(8 symbol periods) is indicated by the interrupt IRQ_4 (CCA_ED_DONE) and
the measurement result is stored in register 0x07 (PHY_ED_LEVEL).
In order to avoid interference with an automatically initiated ED measurement,
the SHR detection can be disabled by setting register bit RX_PDT_DIS
(register 0x15, RX_SYN), refer to section 7.2.
Note that it is not recommended to manually initiate an ED measurement when
using the Extended Operating Mode.
Automatically:
An automated ED measurement is started upon SHR detection. The end of the
automated measurement is not signaled by an interrupt.
When using the Basic Operating Mode and standard compliant data rates, a
valid ED value (register 0x07, PHY_ED_LEVEL) of the currently received frame
is accessible not later than 8 symbol periods after IRQ_2 (RX_START) plus a
processing time of 12 s. For High Data Rate Modes (refer to 7.1.4), the
measurement duration is reduced to 2 symbol periods plus a processing time of
12 s. The ED value remains valid until a new RX_START interrupt is
generated by the next incoming frame or until another ED measurement is
initiated.
When using the Extended Operating Mode, it is useful to mask IRQ_2
(RX_START), thus the interrupt cannot be used as timing reference. A
successful frame reception is signalized by interrupt IRQ_3 (TRX_END). In this
case, the ED value needs to be read within the time span of a next SHR
detection plus the ED measurement time in order to avoid overwrite of the
current ED value.
相關PDF資料 |
PDF描述 |
|---|---|
| R80C52XXX-12SHXXX | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, CQCC44 |
| MQ80C32-12SBR | 8-BIT, 12 MHz, MICROCONTROLLER, CQFP44 |
| IF180C52XXX-36D | 8-BIT, MROM, 36 MHz, MICROCONTROLLER, PQFP44 |
| IV80C32XXX-36 | 8-BIT, 36 MHz, MICROCONTROLLER, PQFP44 |
| IF180C52CXXX-20R | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44 |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MJ-80C32E-30 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Rad. Tolerant 8-bit ROMless Microcontroller |
| MJ-80C32E-30-E | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Rad. Tolerant 8-bit ROMless Microcontroller |
| MJ8100 | 制造商:ASI 功能描述:8100 N11E4C |
| MJ8100R | 制造商:SEME-LAB 制造商全稱:Seme LAB 功能描述:Bipolar PNP Device in a Hermetically sealed TO39 |
| MJ-82-1 | 制造商:SPC Multicomp 功能描述:SOCKET PCB DC POWER 制造商:SPC Multicomp 功能描述:SOCKET, PCB, DC POWER 制造商:SPC Multicomp 功能描述:SOCKET, PCB, DC POWER; Gender:Receptacle; Connector Mounting:PCB; Contact Termination:Through Hole Vertical; Connector Mounting Orientation:PCB; Connector Type:Standard Power Entry ;RoHS Compliant: Yes |
發(fā)布緊急采購，3分鐘左右您將得到回復。