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DSC3.1-030-115
大允許頻率為20 MHz，小脈沖寬度
10 ns高或低。沒有低頻率限制。
20 MHz或100 kHz內(nèi)部時基通常會生成
除非您選擇了一些外部源，否則請使用源信號。
通用正時信號連接
通用定時信號為GPCTR0\U源，
GPCTR0\U門，GPCTR0\U出，GPCTR0\U上下，
GPCTR1\U源、GPCTR1\U門、GPCTR1\U輸出、，
GPCTR1\U UP\U DOWN和FREQ\U OUT。
GPCTR0\U源信號
任何PFI引腳都可以從外部輸入GPCTR0\U源信號，即
可用作PFI8/GPCTR0\U源引腳的輸出。
GPCTR0\U源信號作為輸入配置在
邊緣檢測模式。您可以選擇任何PFI引腳作為的源
GPCTR0\U源并配置上升或
下降沿。
作為輸出，GPCTR0\U源信號反映實際時鐘
已連接到通用計數(shù)器0。即使另一個PFI是
外部輸入源時鐘。此輸出設(shè)置為三態(tài)
啟動。

The maximum allowed frequency is 20 MHz, with a minimum pulse width of 10 ns high or low. There is no minimum frequency limitation. Either the 20 MHz or 100 kHz internal timebase normally generates the UISOURCE signal unless you select some external source. General-Purpose Timing Signal Connections The general-purpose timing signals are GPCTR0_SOURCE, GPCTR0_GATE, GPCTR0_OUT, GPCTR0_UP_DOWN, GPCTR1_SOURCE, GPCTR1_GATE, GPCTR1_OUT, GPCTR1_UP_DOWN, and FREQ_OUT. GPCTR0_SOURCE Signal Any PFI pin can externally input the GPCTR0_SOURCE signal, which is available as an output on the PFI8/GPCTR0_SOURCE pin. As an input, the GPCTR0_SOURCE signal is configured in the edge-detection mode. You can select any PFI pin as the source for GPCTR0_SOURCE and configure the polarity selection for either rising or falling edge. As an output, the GPCTR0_SOURCE signal reflects the actual clock connected to general-purpose counter 0. This is true even if another PFI is externally inputting the source clock. This output is set to tri-state at startup.