參數(shù)資料
型號: MC9328MXLVM20
廠商: Freescale Semiconductor
文件頁數(shù): 81/90頁
文件大?。?/td> 0K
描述: IC MCU I.MX 200MHZ 256-MAPBGA
標準包裝: 152
系列: i.MXL
核心處理器: ARM9
芯體尺寸: 32-位
速度: 200MHz
連通性: EBI/EMI,I²C,MMC/SD,SPI,SSI,UART/USART,USB
外圍設備: DMA,I²S,LCD,POR,PWM,WDT
輸入/輸出數(shù): 97
程序存儲器類型: ROMless
電壓 - 電源 (Vcc/Vdd): 1.7 V ~ 3.3 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 256-LFBGA
包裝: 托盤
Functional Description and Application Information
MC9328MXL Technical Data, Rev. 8
82
Freescale Semiconductor
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)
4.14.2
Non-Gated Clock Mode
Figure 65 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 66 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 36.
Figure 65. Sensor Output Data on Pixel Clock Falling Edge
CSI Latches Data on Pixel Clock Rising Edge
VSYNC
PIXCLK
DATA[7:0]
Valid Data
1
2
3
4
5
6
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