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TMS320F28335ZHHA 参数 Datasheet PDF下载

TMS320F28335ZHHA图片预览
型号: TMS320F28335ZHHA
PDF下载: 下载PDF文件 查看货源
内容描述: 数字信号控制器(DSC ) [Digital Signal Controllers (DSCs)]
分类和应用: 微控制器和处理器外围集成电路数字信号处理器装置PC时钟
文件页数/大小: 195 页 / 2496 K
品牌: TI [ TEXAS INSTRUMENTS ]
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TMS320F28335, TMS320F28334, TMS320F28332  
TMS320F28235, TMS320F28234, TMS320F28232  
www.ti.com  
SPRS439IJUNE 2007REVISED MARCH 2011  
6.9.3 Sampling Window Width for Input Signals  
The following section summarizes the sampling window width for input signals for various input qualifier  
configurations.  
Sampling frequency denotes how often a signal is sampled with respect to SYSCLKOUT.  
Sampling frequency = SYSCLKOUT/(2 * QUALPRD), if QUALPRD 0  
Sampling frequency = SYSCLKOUT, if QUALPRD = 0  
Sampling period = SYSCLKOUT cycle x 2 x QUALPRD, if QUALPRD 0  
In the above equations, SYSCLKOUT cycle indicates the time period of SYSCLKOUT.  
Sampling period = SYSCLKOUT cycle, if QUALPRD = 0  
In a given sampling window, either 3 or 6 samples of the input signal are taken to determine the validity of  
the signal. This is determined by the value written to GPxQSELn register.  
Case 1:  
Qualification using 3 samples  
Sampling window width = (SYSCLKOUT cycle x 2 x QUALPRD) x 2, if QUALPRD 0  
Sampling window width = (SYSCLKOUT cycle) x 2, if QUALPRD = 0  
Case 2:  
Qualification using 6 samples  
Sampling window width = (SYSCLKOUT cycle x 2 x QUALPRD) x 5, if QUALPRD 0  
Sampling window width = (SYSCLKOUT cycle) x 5, if QUALPRD = 0  
XCLKOUT  
GPIOxn  
t
w(GPI)  
Figure 6-11. General-Purpose Input Timing  
Copyright © 2007–2011, Texas Instruments Incorporated  
Electrical Specifications  
133  
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Product Folder Link(s): TMS320F28335 TMS320F28334 TMS320F28332 TMS320F28235 TMS320F28234  
TMS320F28232  
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