参数资料
型号: MCIMX357DVM5BR2
厂商: Freescale Semiconductor
文件页数: 107/147页
文件大小: 0K
描述: IC MPU I.MX35 400MAPBGA
标准包装: 1,000
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: 带卷 (TR)
i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 10
Freescale Semiconductor
62
4.9.8.3
MII Transmit Signal Timing
The transmitter timing signals consist of FEC_TXD[3:0], FEC_TX_EN, FEC_TX_ER, and
FEC_TX_CLK. The transmitter functions correctly up to a FEC_TX_CLK maximum frequency of
25 MHz + 1%. There is no minimum frequency requirement. Additionally, the processor clock frequency
must exceed twice the FEC_TX_CLK frequency. Table 49 lists MII transmit channel timings.
1 FEC_TX_EN, FEC_TX_CLK, and FEC_TXD0 have the same timing when in 10 Mbps 7-wire interface mode.
Figure 40 shows the MII transmit signal timings listed in Table 49.
Figure 40. MII Transmit Signal Timing Diagram
4.9.8.4
MII Asynchronous Inputs Signal Timing
The MII asynchronous timing signals are FEC_CRS and FEC_COL. Table 50 lists MII asynchronous
inputs signal timing.
1 FEC_COL has the same timing in 10 Mbit 7-wire interface mode.
Table 49. MII Transmit Signal Timing
Num
Characteristic1
Min.
Max.
Unit
M5
FEC_TX_CLK to FEC_TXD[3:0], FEC_TX_EN, FEC_TX_ER
invalid
5—
ns
M6
FEC_TX_CLK to FEC_TXD[3:0], FEC_TX_EN, FEC_TX_ER
valid
—20
ns
M7
FEC_TX_CLK pulse width high
35%
65%
FEC_TX_CLK period
M8
FEC_TX_CLK pulse width low
35%
65%
FEC_TX_CLK period
Table 50. MII Asynch Inputs Signal Timing
Num
Characteristic
Min.
Max.
Unit
M91
FEC_CRS to FEC_COL minimum pulse width
1.5
FEC_TX_CLK period
FEC_TX_CLK (input)
FEC_TXD[3:0] (outputs)
FEC_TX_EN
FEC_TX_ER
M7
M8
M5
M6
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