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IMX28AEC bảng dữ liệu(PDF) 41 Page - Freescale Semiconductor, Inc

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Giải thích chi tiết về linh kiện  Processors Data Sheet for Automotive Products High assurance boot
PDF  72 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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IMX28AEC bảng dữ liệu(HTML) 41 Page - Freescale Semiconductor, Inc

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i.MX28 Applications Processors Data Sheet for Automotive Products, Rev. 1
Freescale Semiconductor
41
3.5.7
General-Purpose Media Interface (GPMI) Timing
The i.MX28 GPMI controller is a flexible interface NAND Flash controller with 8-bit data width, up to
50MB/s I/O speed and individual chip select.
It supports normal timing mode, using two Flash clock cycles for one access of RE and WE. AC timings
are provided as multiplications of the clock cycle and fixed delay. Figure 20, Figure 21, Figure 22 and
Figure 23 depict the relative timing between GPMI signals at the module level for different operations
under normal mode. Table 48 describes the timing parameters (NF1–NF17) that are shown in the figures.
Figure 20. Command Latch Cycle Timing Diagram
Figure 21. Address Latch Cycle Timing Diagram
CLE
CEn
WE
ALE
IO[7:0]
Command
NF9
NF8
NF1
NF2
NF5
NF3
NF4
NF6
NF7
CLE
CEn
WE
ALE
IO[7:0]
Address
NF9
NF8
NF1
NF5
NF3
NF4
NF6
NF11
NF10
NF7



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