參數(shù)資料
型號: XE8807AMI026TLF
廠商: Semtech
文件頁數(shù): 9/143頁
文件大?。?/td> 0K
描述: IC MCU LOW PWR MTP FLASH 32-TQFP
標(biāo)準(zhǔn)包裝: 1
系列: XE880x
應(yīng)用: 感測機
核心處理器: Coolrisc816?
程序存儲器類型: 閃存(11 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
輸入/輸出數(shù): 24
電源電壓: 2.4 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-TQFP
包裝: 標(biāo)準(zhǔn)包裝
供應(yīng)商設(shè)備封裝: 32-TQFP(7x7)
產(chǎn)品目錄頁面: 585 (CN2011-ZH PDF)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名稱: XE8807AMI026DKR
Semtech 2006
www.semtech.com
14-26
XE8806A/XE8807A
14.12.2.5.3
Data transmission
To handle the transmission data by interrupt, enable the RF interface transmission interrupt in the interrupt handler
of the circuit.
We need to send the start sequence (preamble) first. The start sequence is defined as 10101010 10101010
10101010 11010100. Since the NRZ Level encoder is enabled, as “10101010”, “10101010”, “10101010” and
“11010100” should be written to the register RegRfifTx. The FIFO is now full, and we can wait for the interrupt
which will indicate that the FIFO is empty. At occurrence of the interrupt, 4 bytes of the message can be written to
the FIFO until all message bytes are sent.
14.12.2.6 Transmission mode using Manchester code
This RF link uses a transmission in the 433MHz frequency band. The protocol of the messages to be sent is
Manchester Space. The start sequence of the message is a code violation. The messages have a data rate of 19.2
kbit/s with a frequency deviation of 40 kHz. The output power is 15 dBm. The following paragraphs will show how
to set-up the XE1202A, how to set-up the RF interface and how to handle the received data.
14.12.2.6.1
XE1202A set-up
To set the XE1202A in transmission mode, set the pins MODE(2:0) = 111.
To select the 433 MHz band, the bits FSParam_band = 01. The frequency deviation is set to 40 kHz by writing
RTParam_Dev = 10. The baud rate is set to 38.4 kb/s by writing FSParam_BR = 011. The output power is set to 15
dbm by writing RTParam_Tpow = 11. The setup of the XE1202A is shown in Table 14-33.
Register
Register Address
7
6
5
4
3
2
1
0
RTParam1
00000
0
1
RTParam2
00001
0
1
0
FSParam1
00010
0
1
0
1
0
1
FSParam2
00011
0
FSParam3
00100
0
DataOut
00101
0
ADParam1
00110
0
ADParam2
00111
0
Pattern1
01000
0
Pattern2
01001
0
Pattern3
01010
0
Pattern4
01011
0
Table 14-33. XE1202A register set-up (see XE1202A datasheet for bit explanation)
14.12.2.6.2
RF interface set-up
We then set-up the RF interface of the microcontroller circuit as a transmitter (RfifEnRx = 0 and RfifEnTx = 1).
Assume that the RC clock frequency used in the microcontroller is 1.2 MHz. To select the correct baud rate of 19.2
kbit/s according to the equation in chapter 14.10 (attention: the baud rate is twice the bit rate in the Manchester
code), fine*coarse=1.2e06/(16*38.4e3)=1.95. We can approximate this at 2. This can be done by setting
RfifBRCoarse = 00 and RfifBRFine = 0001.
The external bit synchronization clock is switched off by clearing the bit RfifTxClock = 0.
The encoder is enabled and set to Manchester Space encoding by setting RfifEnCod = 1 and RfifPCM = 010.
The set-up of the interface is summarized in Table 14-34.
相關(guān)PDF資料
PDF描述
XIO2200AGGW IC PCI-EXPRESS/BUS BRIDGE 176BGA
XIO2200AZGW IC PCI-EXPRESS/BUS BRIDGE 176BGA
XPC823ZT81B2T IC MPU POWERQUICC 81MHZ 256-PBGA
XPC8240RZU250E MCU HOST PROCESSOR 352-TBGA
XQ6SLX150T-3CSG484I IC FPGA SPARTAN-6Q 484-CSBGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XE88LC01 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Sensing Machine 16 + 10 bit Data Acquisition Ultra Low-Power Microcontroller
XE88LC01MI000 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Sensing Machine 16 + 10 bit Data Acquisition Ultra Low-Power Microcontroller
XE88LC01MI027 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Sensing Machine 16 + 10 bit Data Acquisition Ultra Low-Power Microcontroller
XE88LC01MI032 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Sensing Machine 16 + 10 bit Data Acquisition Ultra Low-Power Microcontroller
XE88LC01RI000 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Sensing Machine 16 + 10 bit Data Acquisition Ultra Low-Power Microcontroller