参数资料
型号: MCIMX31LDVKN5D
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 532 MHz, MICROPROCESSOR, PBGA457
封装: 14 X 14 MM, 0.50 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-457
文件页数: 62/118页
文件大小: 1083K
代理商: MCIMX31LDVKN5D
MCIMX31/MCIMX31L Technical Data, Rev. 4.3
48
Freescale Semiconductor
Electrical Characteristics
NOTE
SDR SDRAM CLK parameters are being measured from the 50%
point—that is, high is defined as 50% of signal value and low is defined as
50% of signal value.
The timing parameters are similar to the ones used in SDRAM data
sheets—that is, Table 34 indicates SDRAM requirements. All output signals
are driven by the ESDCTL at the negative edge of SDCLK and the
parameters are measured at maximum memory frequency.
Figure 35. SDRAM Refresh Timing Diagram
SD13
Data setup time
tDS
2.0
ns
SD14
Data hold time
tDH
1.3
ns
1 SD11 and SD12 are determined by SDRAM controller register settings.
Table 35. 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
Table 34. SDR SDRAM Write Timing Parameters (continued)
ID
Parameter
Symbol
Min
Max
Unit
CS
CAS
WE
RAS
ADDR
BA
ROW/BA
SD6
SD7
SD11
SD10
SDCLK
SD1
SD2
SDCLK
SD3
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