参数资料
型号: XE8806AMI026TLF
厂商: Semtech
文件页数: 140/143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
14-16
XE8806A/XE8807A
14.12.1.2.1
XE1201A set-up
To set the XE1201A in reception mode, set the pin EN to 1 and the pin RXTX to 1. The data rate of the XE1201A
by default is 16kbit/s and the bit synchronizer is enabled by default. This means that the data registers of the
XE1201A can remain in the default settings shown in Table 14-20. The serial interface connections of Figure 14-8
are therefore not required.
Register
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Register A
0
1
0
Register B
0
Register C
0
1
0
1
0
1
0
1
0
Table 14-20. XE1201A default register set-up (see XE1201A datasheet for bit explanation)
14.12.1.2.2
RF interface set-up
Set-up the RF interface of the microcontroller circuit as a receiver (RfifEnRx = 1 and RfifEnTx = 0).
Assume that the RC clock frequency used in the microcontroller is 1.0 MHz. To select the correct baud rate of 16
kbit/s according to the equation in chapter 14.10, fine*coarse=1.0e06/(16*16e3)=3.9. This can be approximated at
4 (see specification in Table 14-19). This can be done by setting RfifBRCoarse = 01 and RfifBRFine = 0000.
The external bit synchronization clock is switched off by setting the bit RfifRxClock = 0.
The decoder is enabled and set to NRZ level decoding by setting RfifEnCod = 1 and RfifPCM = 000.
The start pattern detection is enabled by setting RfifEnStart = 11 and writing 11010111 to RfifRxSPat.
The start sequence detection interrupt is enabled by setting RfifRxIrqEn = 001.
The set-up of the interface is summarized in the Table 14-21.
Register
contents
RegRfifCmd1
00010000
RegRfifCmd2
11100000
RegRfifCmd3
00100010
RegRfifRxSPat
11010111
Table 14-21. RF interface set-up
14.12.1.2.3
Data reception
In order to handle the received data by interrupt, enable the RF interface reception interrupt in the interrupt handler
of the circuit.
Data received before the first start pattern detection after the enabling of the interface are not relevant since we are
not yet synchronized to the messages. Since the start detection interrupt has been enabled, nothing has to be
done until the interrupt occurs.
When the first interrupt occurs, we are synchronized to the messages. In order to read data in an efficient way, the
interrupt source is modified and set to “Rx FIFO full” by writing 100 to RfifRxIrqEn. Once this is done, we can wait
for the next interrupt to download the received message.
At each new interrupt, we can now read 4 bytes of the received message by reading the register RegRfifRx 4
consecutive times. The interrupt should be served before the next byte is received since otherwise data may be
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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