參數(shù)資料
型號(hào)： MC9328MXLVP20
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
元件分類： 微處理器
英文描述： i.MX Integrated Portable System Processor
中文描述： i.MX處理器集成的便攜式系統(tǒng)
文件頁(yè)數(shù)： 90/96頁(yè)
文件大?。?/td> 1495K
代理商： MC9328MXLVP20
MC9328MX1 Advance Information, Rev. 4
90
Freescale Semiconductor
Specifications
The limitation on pixel clock rise time / fall time are not specified. It should be calculated from the hold time and
setup time, according to:
Rising-edge latch data
max rise time allowed = (positive duty cycle - hold time)
max fall time allowed = (negative duty cycle - setup time)
In most of case, duty cycle is 50 / 50, therefore
max rise time = (period / 2 - hold time)
max fall time = (period / 2 - setup time)
For example: Given pixel clock period = 10ns, duty cycle = 50 / 50, hold time = 1ns, setup time = 1ns.
positive duty cycle = 10 / 2 = 5ns
=> max rise time allowed = 5 - 1 = 4ns
negative duty cycle = 10 / 2 = 5ns
=> max fall time allowed = 5 - 1 = 4ns
Falling-edge latch data
max fall time allowed = (negative duty cycle - hold time)
max rise time allowed = (positive duty cycle - setup time)
3.22.2 Non-Gated Clock Mode
Figure 70 shows the timing diagram when the CMOS sensor output data is configured for negative edge and the
CSI is programmed to received data on the positive edge. Figure 71 on page 91 shows the timing diagram when the
CMOS sensor output data is configured for positive edge and the CSI is programmed to received data in negative
edge. The parameters for the timing diagrams are listed in Table 43 on page 91.
4
csi_d hold time
1
–
ns
5
csi_pixclk high time
10.42
–
ns
6
csi_pixclk low time
10.42
–
ns
7
csi_pixclk frequency
0
48
MHz
Table 42. Gated Clock Mode Timing Parameters (Continued)
Ref No.
Parameter
Minimum
Maximum
Unit
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