参数资料
型号: MCIMX357DVM5B
厂商: Freescale Semiconductor
文件页数: 91/147页
文件大小: 0K
描述: PROCESSOR MULTIMEDIA 400PBGA
标准包装: 90
系列: i.MX35
核心处理器: ARM11
芯体尺寸: 32-位
速度: 532MHz
连通性: 1 线,CAN,EBI/EMI,以太网,I²C,MMC,SPI,SSI,UART/USART,USB OTG
外围设备: DMA,I²S,LCD,POR,PWM,WDT
输入/输出数: 96
程序存储器类型: ROMless
RAM 容量: 128K x 8
电压 - 电源 (Vcc/Vdd): 1.33 V ~ 1.47 V
振荡器型: 外部
工作温度: -20°C ~ 70°C
封装/外壳: 400-LFBGA
包装: 托盘
i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 10
Freescale Semiconductor
48
NOTE
Test conditions are: pin voltage 1.7 V–1.95 V, capacitance 15 pF for all pins
(both DDR and non-DDR pins), drive strength is high (7.2 mA). “High” is
defined as 80% of signal value and “low” is defined as 20% of signal value.
SDR SDRAM CLK parameters are measured from the 50% point—that is,
“high” is defined as 50% of signal value, and “low” is defined as 50% of
signal value. tCH + tCL will not exceed 7.5 ns for 133 MHz. DDR SDRAM
CLK parameters are measured at the crossing point of SDCLK and SDCLK
(inverted clock).
The timing parameters are similar to the ones used in SDRAM data sheets.
Table 36 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 29. SDRAM Refresh Timing Diagram
Table 37. 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
CS
CAS
WE
RAS
ADDR
BA
ROW/BA
SD6
SD7
SD11
SD10
SDCLK
SD1
SD2
SDCLK
SD3
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