參數(shù)資料
型號: MC9328MX21SVM
廠商: Freescale Semiconductor
文件頁數(shù): 9/88頁
文件大?。?/td> 0K
描述: IC MPU I.MX21S 289-MAPBGA
標準包裝: 90
系列: i.MX21
核心處理器: ARM9
芯體尺寸: 32-位
速度: 266MHz
連通性: 1 線,EBI/EMI,I²C,IrDA,MMC,智能卡,SPI,SSI,UART/USART,USB OTG
外圍設備: DMA,I²S,LCD,POR,PWM,WDT
輸入/輸出數(shù): 192
程序存儲器類型: ROMless
電壓 - 電源 (Vcc/Vdd): 1.45 V ~ 3.3 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 289-LFBGA
包裝: 托盤
Specifications
MC9328MX21S Technical Data, Rev. 1.3
Freescale Semiconductor
17
3.6
Reset Module
The timing relationships of the Reset module with the POR and RESET_IN are shown in Figure 2 and
Figure 3. Be aware that NVDD must ramp up to at least 1.7V for NVDD1 and 2.7V for NVDD2-6 before
QVDD is powered up to prevent forward biasing.
Figure 2. Timing Relationship with POR
Figure 3. Timing Relationship with RESET_IN
POR
RESET_POR
RESET_DRAM
HRESET
RESET_OUT
CLK32
HCLK
1
2
3
4
Exact 300ms
7 cycles @ CLK32
14 cycles @ CLK32
Can be adjusted depending on the crystal
start-up time 32kHz or 32.768kHz
14 cycles @ CLK32
RESET_IN
CLK32
HCLK
5
4
HRESET
RESET_OUT
6
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
i.MX21
Product
Family
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