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PCIMX258CJM4A bảng dữ liệu(PDF) 60 Page - Freescale Semiconductor, Inc

tên linh kiện PCIMX258CJM4A
Giải thích chi tiết về linh kiện  i.MX25 Applications Processor for Consumer and Industrial Products
PDF  144 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
Trang chủ  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

PCIMX258CJM4A bảng dữ liệu(HTML) 60 Page - Freescale Semiconductor, Inc

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i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 3
60
Freescale Semiconductor
Figure 28. SDRAM Self-Refresh Cycle Timing Diagram
NOTE
The clock continues to run unless CKE is low. Then the clock is stopped in
low state.
Table 44. SDRAM Refresh Timing Parameters
ID
Parameter
Symbol
Min.
Max.
Unit
SD1
SDRAM clock high-level width
tCH
3.4
4.1
ns
SD2
SDRAM clock low-level width
tCL
3.4
4.1
ns
SD3
SDRAM clock cycle time
tCK
7.5
—
ns
SD6
Address setup time
tAS
1.8
—
ns
SD7
Address hold time
tAH
1.8
—
ns
SD10
Precharge cycle period1
1 SD10 and SD11 are determined by SDRAM controller register settings.
tRP
1
4
clock
SD11
Auto precharge command period1
tRC
2
20
clock
SDCLK
CS
CAS
RAS
ADDR
BA
WE
CKE
Don’t care
SD16
SD16



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