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MCIMX503CVM8B bảng dữ liệu(PDF) 68 Page - Freescale Semiconductor, Inc

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Giải thích chi tiết về linh kiện  i.MX50 Applications Processors for Consumer Products
PDF  134 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
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MCIMX503CVM8B bảng dữ liệu(HTML) 68 Page - Freescale Semiconductor, Inc

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i.MX50 Applications Processors for Consumer Products, Rev. 2
68
Freescale Semiconductor
Electrical Characteristics
4.8.1
DRAM Command & Address Output Timing—DDR2 and LPDDR1
The following diagrams and tables specify the timings related to the address and command pins, which
interfaces DDR2 and LPDDR1 memory devices.
Table 44. EMI Command/Address AC Timing
ID
Description
Symbol
Min
Max
Unit
DDR1
CK cycle time
tCK
3.75
—
ns
DDR2
CK high level width
tCH
0.48 tCK
0.52 tCK
ns
DDR3
CK low level width
tCL
0.48 tCK
0.52 tCK
ns
DDR4
Address and control output setup time
tIS
0.5 tCK
- 0.3
—ns
DDR5
Address and control output hold time
tIH
0.5 tCK
- 0.3
—ns
Figure 28. DRAM Command/Address Output Timing—DDR2 and LPDDR1
DRAM_SDCLK
DRAM_SDCLK_B
DRAM_CS0
DRAM_RAS
DRAM_CAS
DRAM_SDWE
bank
row
bank
column
DRAM_ADDR
DDR1
DDR2
DDR3
DDR4
DDR5
DDR4
DDR5
DDR4
DDR5



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