参数资料
型号: MC9328MXSCVF10R2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 100 MHz, MICROPROCESSOR, PBGA225
封装: 13 X 13 MM, PLASTIC, BGA-225
文件页数: 7/72页
文件大小: 1411K
代理商: MC9328MXSCVF10R2
Specifications
MC9328MXS Advance Information, Rev. 0
Freescale Semiconductor
15
Figure 4. Timing Relationship with RESET_IN
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
(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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