参数资料
型号: MC9328MX1VM20
厂商: Freescale Semiconductor
文件页数: 22/100页
文件大小: 0K
描述: IC MCU I.MX 200MHZ 256-MAPBGA
标准包装: 152
系列: i.MX1
核心处理器: ARM9
芯体尺寸: 32-位
速度: 200MHz
连通性: EBI/EMI,I²C,MMC,智能卡,SPI,SSI,UART/USART,USB
外围设备: DMA,I²S,LCD,POR,PWM,WDT
输入/输出数: 110
程序存储器类型: ROMless
电压 - 电源 (Vcc/Vdd): 1.7 V ~ 3.3 V
振荡器型: 外部
工作温度: 0°C ~ 70°C
封装/外壳: 256-MAPBGA
包装: 托盘
Functional Description and Application Information
MC9328MX1 Technical Data, Rev. 7
28
Freescale Semiconductor
Figure 4. Timing Relationship with RESET_IN
4.4
External Interface Module
The External Interface Module (EIM) handles the interface to devices external to the i.MX1 processor,
including the generation of chip-selects for external peripherals and memory. The timing diagram for the
EIM is shown in Figure 5, and Table 12 defines the parameters of signals.
Table 11. Reset Module Timing Parameter Table
Ref
No.
Parameter
1.8 ± 0.1 V
3.0 ± 0.3 V
Unit
Min
Max
Min
Max
1
Width of input POWER_ON_RESET
note1
1 POR width is dependent on the 32 or 32.768 kHz crystal oscillator start-up time. Design margin should allow for crystal
tolerance, i.MX chip variations, temperature impact, and supply voltage influence. Through the process of supplying crystals
for use with CMOS oscillators, crystal manufacturers have developed a working knowledge of start-up time of their crystals.
Typically, start-up times range from 400 ms to 1.2 seconds for this type of crystal.
If an external stable clock source (already running) is used instead of a crystal, the width of POR should be ignored in
calculating timing for the start-up process.
note1
––
2
Width of internal POWER_ON_RESET
(9600 *CLK32 at 32 kHz)
300
ms
3
7K to 32K-cycle stretcher for SDRAM reset
7
Cycles of
CLK32
4
14K to 32K-cycle stretcher for internal system reset
HRESERT and output reset at pin RESET_OUT
14
Cycles of
CLK32
5
Width of external hard-reset RESET_IN
4
4
Cycles of
CLK32
6
4K to 32K-cycle qualifier
4
Cycles of
CLK32
14 cycles @ CLK32
RESET_IN
CLK32
HCLK
5
4
HRESET
RESET_OUT
6
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