参数资料
型号: MC9328MXLVF20R2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 200 MHz, RISC PROCESSOR, PBGA225
封装: 13 X 13 MM, 0.80 MM PITCH, PLASTIC, BGA-225
文件页数: 10/84页
文件大小: 1448K
代理商: MC9328MXLVF20R2
MC9328MXL Advance Information, Rev. 5.1
18
Freescale Semiconductor
Specifications
Figure 4. Timing Relationship with RESET_IN
Table 11. Reset Module Timing Parameter Table
Ref
No.
Parameter
1.8V ± 0.10V
3.0V ± 0.30V
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
(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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