MPC8548E Freescale, MPC8548E Datasheet - Page 13

• Manufacturer Part Number: MPC8548E
• Description: Integrated Processor
• Manufacturer: Freescale

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2.1.3
Table 3
preliminary estimates.
2.2
The device requires its power rails to be applied in a specific sequence in order to ensure proper device
operation. These requirements are as follows for power-up:
All supplies must be at their stable values within 50 ms.
Freescale Semiconductor
Local bus interface utilities signals
PCI signals
DDR signal
DDR2 signal
TSEC/10/100 signals
DUART, system control, JTAG
I2C
Notes:
1. The drive strength of the local bus interface is determined by the configuration of the appropriate bits in PORIMPSCR.
2. The drive strength of the PCI interface is determined by the setting of the PCI_GNT1 signal at reset.
3. The drive strength of the DDR interface in half-strength mode is at T
1. V
2. GV
provides information on the characteristics of the output driver strengths. The values are
DD
Power Sequencing
DD
Output Driver Characteristics
, AV
Items on the same line have no ordering requirement with respect to one
another. Items on separate lines must be ordered sequentially such that
voltage rails on a previous step must reach 90% of their value before the
voltage rails on the current step reach 10% of theirs.
MPC8548E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 4
DD
_n, BV
Driver Type
DD
, LV
DD
Table 3. Output Drive Capability
, OV
DD
, SV
NOTE
DD
, TV
36 (half strength mode)
36 (half strength mode)
Output Impedance
DD
Programmable
j
45(default)
45(default)
45(default)
, XV
= 105°C and at GV
150
(Ω)
25
25
25
18
18
45
45
DD
DD
(min).
L/TV
OV
GV
GV
OV
OV
BV
BV
BV
BV
DD
Voltage
Supply
DD
DD
DD
DD
DD
DD
DD
DD
DD
= 2.5/3.3 V
Electrical Characteristics
= 3.3 V
= 2.5 V
= 3.3 V
= 2.5 V
= 3.3 V
= 3.3 V
= 3.3 V
= 2.5 V
= 1.8 V
Notes
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1
2
3
3
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