參數(shù)資料
型號(hào): PXA270
廠商: Intel Corp.
英文描述: Electrical, Mechanical, and Thermal Specification
中文描述: 電氣,機(jī)械和熱規(guī)格
文件頁數(shù): 63/126頁
文件大?。?/td> 1563K
代理商: PXA270
Electrical, Mechanical, and Thermal Specification
5-13
Intel PXA270 Processor
Electrical Specifications
5.7
48 MHz Output Specifications
Software may configure GPIO<11> or GPIO<12> alternate functions to enable the 48-MHz clock
output. The 48-MHz output clock is a divided-down output generated from the 312-MHz
peripheral PLL. Refer to
Table 5-15
for the 48-MHz output specifications. Refer to Section 3 of
this document for GPIO alternate functions in the pin usage table.
Jitter
+/-20pS max
Load capacitance (C
L
)
50pf max
Rise and Fall time (Tr & Tf)
15nS max with 50pF load
Table 5-14. CLK_TOUT Specifications
Parameter
Specifications
Table 5-15. 48 MHz Output Specifications
Parameter
Specifications
Frequency (derived from 13 MHz crystal)
48 MHz
Frequency Accuracy (derived from 13 MHz crystal)
+/-200ppm (maximum)
Symmetry/Duty Cycle variation
30/70 to 70/30% at VCC
Jitter
+/-20pS max
Load capacitance (C
L
)
50pf max
Rise and Fall time (Tr & Tf)
15nS max with 50pF load
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