参数资料
型号: MC9328MXLCVM15
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 150 MHz, RISC PROCESSOR, PBGA256
封装: 14 X 14 MM, 1.30 MM HEIGHT, 0.80 MM PITCH, ROHS COMPLIANT, MAPBGA-256
文件页数: 16/90页
文件大小: 1242K
代理商: MC9328MXLCVM15
Functional Description and Application Information
MC9328MXL Technical Data, Rev. 8
Freescale Semiconductor
23
4.4
External Interface Module
The External Interface Module (EIM) handles the interface to devices external to the i.MXL 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
(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
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.MXL
Product
Family
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