- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45377 > R80C52XXX-12SHXXX (ATMEL CORP) 8-BIT, MROM, 12 MHz, MICROCONTROLLER, CQCC44 PDF資料下載
參數(shù)資料
| 型號： | R80C52XXX-12SHXXX |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, CQCC44 |
| 封裝： | LCC-44 |
| 文件頁數(shù)： | 41/101頁 |
| 文件大?。?/td> | 3398K |
| 代理商： | R80C52XXX-12SHXXX |
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頁當(dāng)前第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
AT86RF212
6 Functional Description
6.1 Introduction – IEEE 802.15.4-2006 Frame Format
Figure 6-1 provides an overview of the physical layer (PHY) frame structure as defined
by the IEEE 802.15.4-2006 standard. Figure 6-2 shows the medium access control
layer (MAC) frame structure.
Figure 6-1. IEEE 802.15.4 Frame Format – PHY Layer Frame Structure
6.1.1 PHY Protocol Data Unit (PPDU)
6.1.1.1 Synchronization Header (SHR)
The SHR consists of a four-octet preamble field (all zero), followed by a single octet
start-of-frame delimiter (SFD). During transmit, the SHR is automatically generated by
the AT86RF212, thus the Frame Buffer shall contain PHR and PSDU only, see section
The transmission of the SHR requires 40 symbols for a transmission with BPSK
modulation and 10 symbols for a transmission with O-QPSK modulation. Table 6-1
illustrates the SHR duration depending on the selected data rate, see also section 10.5.
As the SPI data rate is usually higher than the over-the-air data rate, this allows the
microcontroller to initiate a transmission before the frame buffer write access is
completed.
During frame reception, the SHR is used for synchronization purposes. The matching
SFD determines the beginning of the PHR and the following PSDU payload data.
6.1.1.2 PHY Header (PHR)
The PHY header is a single octet following the SHR. The least significant 7 bits denote
the frame length of the following PSDU, while the most significant bit of that octet is
reserved and shall be set to 0 for IEEE 802.15.4 compliant frames. Even though the
MSB is reserved, AT86RF212 is able to transmit and receive this bit.
In transmit mode, the PHR needs to be supplied as the first octet during Frame Buffer
write access, see section 4.3.2.
In receive mode, the PHR is returned as the first octet during Frame Buffer read
access, see section 4.3.2.
6.1.1.3 PHY Payload (PHY Service Data Unit, PSDU)
The PSDU has a variable length between one and 127 octets. The PSDU contains the
MAC protocol data unit (MPDU), where the last two octets are used for the Frame
Check Sequence (FCS), see section 6.3.
67
8168C-MCU Wireless-02/10
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| IF180C52CXXX-20R | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R80ES11WES | 制造商:UNBRANDED 功能描述:LAMP ENERGY SAVING R80 11W ES |
| R80M | 制造商:Omron Corporation 功能描述: |
| R80P | 制造商:Orion Fans 功能描述:Filter Kit; Retainer only; ABS UL94V-0; Fits 80mm Fan; 83.6mm W; 9.8mm D |
| R80X5200CK | 制造商:Samsung Semiconductor 功能描述:100 Pack 52x80 Minute CD-R Media |
| R8-10 | 制造商:JST Manufacturing 功能描述:8AWG 29.8mm 15mm 制造商:JST Manufacturing 功能描述:Terminal,R8-10 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。