MPC8349E View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

MPC8349E

PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications

Freescale Semiconductor 

Electrical Characteristics

Figure 3 shows the undershoot and overshoot voltage of the PCI interface of the MPC8349E for the 3.3-V

signals, respectively.

Overvoltage

Waveform

11 ns

(Min)

+7.1 V

7.1 V p-to-p

(Min)

4 ns

(Max)

0V

4 ns

(Max)

62.5 ns

+3.6 V

Undervoltage

Waveform

7.1 V p-to-p

(Min)

–3.5 V

Figure 3. Maximum AC Waveforms on PCI Interface for 3.3-V Signaling

2.1.3 Output Driver Characteristics

Table 3 provides information on the characteristics of the output driver strengths. The values are

preliminary estimates.

Table 3. Output Drive Capability

Driver Type

Local bus interface utilities signals

PCI signals (not including PCI output clocks)

PCI output clocks (including PCI_SYNC_OUT)

DDR signal

TSEC/10/100 signals

DUART, system control, I2C, JTAG, USB

GPIO signals

Output Impedance

(Ω)

40

25

40

18

40

40

40

Supply

Voltage

OVDD = 3.3 V

GVDD = 2.5 V

LVDD = 2.5/3.3 V

OVDD = 3.3 V

OVDD = 3.3 V,

LVDD = 2.5/3.3 V

2.2 Power Sequencing

MPC8349E 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.

MPC8349E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10

Freescale Semiconductor

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