参数资料
型号: XE8806AMI026TLF
厂商: Semtech
文件页数: 8/143页
文件大小: 0K
描述: IC MCU LOW PWR MTP FLASH 32-TQFP
标准包装: 1
系列: XE880x
应用: 感测机
核心处理器: Coolrisc816?
程序存储器类型: 闪存(22 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
输入/输出数: 24
电源电压: 2.4 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 32-TQFP
包装: 剪切带 (CT)
供应商设备封装: 32-TQFP(7x7)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名称: XE8806AMI026CT
Semtech 2006
www.semtech.com
14-25
XE8806A/XE8807A
14.12.2.5 Transmission mode using NRZ coding
This RF link uses a wide band transmission in the 915MHz frequency band. The protocol of the messages to be
sent is NRZ Level. The start sequence of the message is a 4 byte pattern (10101010 10101010 10101010
11010100). The messages have a data rate of 76.8 kbit/s with a frequency deviation of 100 kHz. The output power
is 0 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.
14.12.2.5.1
XE1202A set-up
To set the XE1202A in transmission mode, set the pins MODE(2:0) = 111.
To select the 915MHz band, the bits FSParam_band = 11. The frequency deviation is set to 100kHz by writing
RTParam_Dev = 11. The baud rate is set to 76.8 kbit/s by writing FSParam_BR = 100. The output power is set to 0
dBm by writing RTParam_Tpow = 00. The setup of the XE1202a is shown in Table 14-31.
Register
Register Address
7
6
5
4
3
2
1
0
RTParam1
00000
0
RTParam2
00001
0
1
0
FSParam1
00010
1
0
1
0
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 14-31. XE1202A register set-up (see XE1202A datasheet for bit explanation)
14.12.2.5.2
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 76.8
kbit/s according to the equation in chapter 14.10, fine*coarse=1.2e06/(16*76.8e3)=0.98. We can approximate this
at 1 (see specification in Table 14-19). This can be done by setting RfifBRCoarse = 00 and RfifBRFine = 0000.
The external bit synchronization clock is switched off by clearing the bit RfifTxClock = 0.
The encoder is enabled and set to NRZ Level encoding by setting RfifEnCod = 1 and RfifPCM = 000.
The set-up of the interface is summarized in the Table 14-32.
Register
contents
RegRfifCmd1
00000000
RegRfifCmd2
00100010
RegRfifCmd3
00000001
Table 14-32. RF interface set-up
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XE8807AMI026TLF 功能描述:IC MCU LOW PWR MTP FLASH 32-TQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器 - 特定应用 系列:XE880x 产品变化通告:Product Discontinuation 26/Aug/2009 标准包装:250 系列:- 应用:网络处理器 核心处理器:4Kc 程序存储器类型:- 控制器系列:- RAM 容量:16K x 8 接口:以太网,UART,USB 输入/输出数:- 电源电压:1.8V, 3.3V 工作温度:- 安装类型:表面贴装 封装/外壳:208-LQFP 包装:带卷 (TR) 供应商设备封装:PG-LQFP-208 其它名称:SP000314382