参数资料
型号: XE8806AMI026TLF
厂商: Semtech
文件页数: 137/143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
14-13
XE8806A/XE8807A
NRZ - Level
Bi-Phase - Level
output bitstream
output clock
Figure 14-7 : Output clock in Transmission mode
14.10 Baud rate selection
In order to have correct baud rates, the interface has to be fed with a stable and trimmed clock source. The clock
source can be an external clock source or the RC oscillator. The precision of the baud rate will depend on the
precision of the selected clock source. The choice between the RC oscillator and the external clock source is made
with the bit EnExtClock in RegSysClock. The precision of the obtained baud rate is directly proportional to the
frequency deviation of the used clock source.
The bits RfifBRCoarse[1:0] and RfifBRFine[3:0] in RegRfifCmd1 are used to select the appropriate baud rate.
Several RC division factors are available.
The expression of the baud rate is the following:
16
*
coarse
fine
f
baudrate
RCExt
=
with:
RCExt
f
: RC frequency or the half the external clock frequency.
fine and coarse: the division factors selected by RfifBRCoarse and RfifBRFine.
Note that the baud rate is the rate at which the chips are transmitted and is twice the bit rate in Manchester and
Miller coding since these codes use two chips per bit (see chapter 14.7).
RfifBRFine[3:0]
fine
0000
1
0001
2
0010
3
0011
4
...
1101
14
1110
15
1111
16
Table 14-17 : Effect of RfifBRFine[3:0]
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XE8806ARI000 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
XE8806ARI026LF 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
XE8807AMI000 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
XE8807AMI026LF 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Ultra Low-Power Low-Voltage
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