參數(shù)資料
型號(hào): MSC7118VF1200
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 數(shù)字信號(hào)處理
英文描述: 0-BIT, 300 MHz, OTHER DSP, PBGA400
封裝: 17 X 17 MM, MAPBGA-400
文件頁(yè)數(shù): 39/60頁(yè)
文件大?。?/td> 1528K
代理商: MSC7118VF1200
MSC7118 Low-Cost 16-bit DSP with DDR Controller Data Sheet, Rev. 7
Hardware Design Considerations
Freescale Semiconductor
44
3.2.2.4
Case 4
The power-up sequence is as follows:
1.
Turn on the VDDIO (3.3 V) supply first.
2.
Turn on the VDDC (1.2 V), VDDM (2.5 V), and VREF (1.25 V) supplies simultaneously (second).
Note:
Make sure that the time interval between the ramp-up of VDDIO and VDDC is less than 10 ms.
The power-down sequence is as follows:
1.
Turn off the VDDC (1.2 V), VREF (1.25 V), and VDDM (2.5 V) supplies simultaneously (first).
2.
Turn of the VDDIO (3.3 V) supply last.
Use the following guidelines:
Make sure that the time interval between the ramp-up or ramp-down time for VDDC and VDDM is less than 10 ms for
power-up and power-down.
Refer to Figure 29 for relative timing for Case 4.
Figure 29. Voltage Sequencing Case 4
Time
V
ol
tage
Ramp-down
Ramp-up
VDDIO = 3.3 V
VDDM = 2.5 V
VDDC = 1.2 V
VREF = 1.25 V
<10 ms
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:
MSC7118VF1200,
MSC7118VM1200,
MSC711XADS
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