参数资料
型号: MCIMX258CVM4
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA400
封装: 17 X 17 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-400
文件页数: 114/154页
文件大小: 1498K
代理商: MCIMX258CVM4
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 8
62
Freescale Semiconductor
3.7.6.1.2
Mobile DDR SDRAM–Specific Parameters
The following diagrams and tables specify the timings related to the SDRAMC module which interfaces
with the mobile DDR SDRAM.
Figure 29. Mobile DDR SDRAM Write Cycle Timing Diagram
Table 47. SDRAM Self-Refresh Cycle Timing Parameters
ID
Parameter
Symbol
Min.
Max.
Unit
SD16
CKE output delay time
tCKS
1.8
ns
Table 48. Mobile DDR SDRAM Write Cycle Timing Parameters1
1 Test condition: Measured using delay line 5 programmed as follows: ESDCDLY5[15:0] = 0x0703.
ID
Parameter
Symbol
Min.
Max.
Unit
SD17
DQ and DQM setup time to DQS
tDS
0.95
ns
SD18
DQ and DQM hold time to DQS
tDH
0.95
ns
SD19
Write cycle DQS falling edge to SDCLK output delay time
tDSS
1.8
ns
SD20
Write cycle DQS falling edge to SDCLK output hold time
tDSH
1.8
ns
SDCLK
DQS (output)
DQ (output)
DQM (output)
Data
DM
SD17
SD18
SD19
SD20
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