mpc8349ea Freescale Semiconductor, Inc, mpc8349ea Datasheet - Page 9

• Manufacturer Part Number: mpc8349ea
• Description: Mpc8349ea Powerquicc
• Manufacturer: Freescale Semiconductor, Inc

Figure 3
3.3-V signals, respectively.
2.1.3
Table 3
preliminary estimates.
2.2
MPC8349EA does not require the core supply voltage and I/O supply voltages to be applied in any
particular order. Note that during the power ramp up, before the power supplies are stable, there may be a
period of time that I/O pins are actively driven. After the power is stable, as long as PORESET is asserted,
most I/O pins are three-stated. To minimize the time that I/O pins are actively driven, it is recommended
to apply core voltage before I/O voltage and assert PORESET before the power supplies fully ramp up.
Freescale Semiconductor
Local bus interface utilities signals
PCI signals (not including PCI output clocks)
PCI output clocks (including PCI_SYNC_OUT)
DDR signal
DDR2 signal
TSEC/10/100 signals
DUART, system control, I
GPIO signals
provides information on the characteristics of the output driver strengths. The values are
shows the undershoot and overshoot voltage of the PCI interface of the MPC8349EA for the
Power Sequencing
MPC8349EA PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10
Output Driver Characteristics
Figure 3. Maximum AC Waveforms on PCI Interface for 3.3-V Signaling
Driver Type
Undervoltage
Overvoltage
2
Waveform
Waveform
C, JTAG, USB
Table 3. Output Drive Capability
11 ns
(Min)
4 ns
(Max)
36 (half strength mode)
Output Impedance
62.5 ns
4 ns
(Max)
(Ω)
+7.1 V
+3.6 V
–3.5 V
40
25
40
18
18
40
40
40
0 V
7.1 V p-to-p
7.1 V p-to-p
(Min)
(Min)
LV
LV
GV
GV
OV
Electrical Characteristics
OV
OV
DD
DD
Voltage
Supply
DD
DD
DD
DD
DD
= 2.5/3.3 V
= 2.5/3.3 V
= 3.3 V,
= 3.3 V
= 3.3 V
= 2.5 V
= 1.8 V
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