MSC7118 Freescale Semiconductor / Motorola, MSC7118 Datasheet - Page 43

• Manufacturer Part Number: MSC7118
• Description: Low-Cost 16-bit DSP with DDR Controller
• Manufacturer: Freescale Semiconductor / Motorola

3.2.2.3
The power-up sequence is as follows:
Note:
The power-down sequence is as follows:
Use the following guidelines:
Freescale Semiconductor
1.
2.
3.
1.
2.
3.
•
•
•
Turn on the V
Turn on the V
Turn on the V
Make sure that the time interval between the ramp-up of V
Turn off the V
Turn off the V
Turn of the V
Make sure that the time interval between the ramp-down for V
Make sure that the time interval between the ramp-up or ramp-down time for V
power-up and power-down.
Refer to Figure 28 for relative timing for Case 3.
Case 3
<10 ms
Ramp-up
DDIO
DDIO
DDC
DDM
DDM
DDC
<10 ms
MSC7118 Low-Cost 16-bit DSP with DDR Controller Data Sheet, Rev. 7
(1.2 V) supply second.
(1.2 V) supply second.
(3.3 V) supply third (last).
(2.5 V) and V
(3.3 V) supply first.
(2.5 V) and V
Figure 28. Voltage Sequencing Case 3
REF
REF
(1.25 V) supplies simultaneously (third).
(1.25 V) supplies simultaneously (first).
Time
DDIO
DDIO
and V
<10 ms
and V
DDC
Ramp-down
<10 ms
DDC
is less than 10 ms.
is less than 10 ms.
DDC
Hardware Design Considerations
and V
DDM
is less than 10 ms for
V
V
V
V
DDIO
DDM
REF
DDC
= 1.25 V
= 1.2 V
= 2.5 V
= 3.3 V
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