MC9328MX1DVH20 Freescale, MC9328MX1DVH20 Datasheet - Page 28
MC9328MX1DVH20
Manufacturer Part Number
MC9328MX1DVH20
Description
Manufacturer
Freescale
Datasheet
1.MC9328MX1DVH20.pdf
(100 pages)
Specifications of MC9328MX1DVH20
Operating Temperature (max)
70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Not Compliant
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Part Number:
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Manufacturer:
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1
Functional Description and Application Information
4.4
The External Interface Module (EIM) handles the interface to devices external to the i.MX1 processor,
including the generation of chip-selects for external peripherals and memory. The timing diagram for the
EIM is shown in
28
Ref
No.
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.
1
2
3
4
5
6
RESET_OUT
Width of input POWER_ON_RESET
Width of internal POWER_ON_RESET
(9600 *CLK32 at 32 kHz)
7K to 32K-cycle stretcher for SDRAM reset
14K to 32K-cycle stretcher for internal system reset
HRESERT and output reset at pin RESET_OUT
Width of external hard-reset RESET_IN
4K to 32K-cycle qualifier
RESET_IN
HRESET
External Interface Module
CLK32
HCLK
Figure
5, and
Parameter
6
Table 11. Reset Module Timing Parameter Table
Figure 4. Timing Relationship with RESET_IN
Table 12
MC9328MX1 Technical Data, Rev. 7
defines the parameters of signals.
5
note
Min
300
14
7
4
4
1.8 ± 0.1 V
1
Max
300
14
–
7
–
4
14 cycles @ CLK32
note
Min
300
14
3.0 ± 0.3 V
7
4
4
4
1
Freescale Semiconductor
Max
300
14
–
7
–
4
Cycles of
Cycles of
Cycles of
Cycles of
CLK32
CLK32
CLK32
CLK32
Unit
ms
–
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