MPC8541PXALF View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

MPC8541PXALF

PowerQUICC™ III Integrated Communications Processor Hardware Specification

Freescale Semiconductor 

Electrical Characteristics

Figure 3 shows the undershoot and overshoot voltage of the PCI interface of the MPC8541E for the 3.3-V

signals, respectively.

Overvoltage

Waveform

Undervoltage

Waveform

11 ns

(Min)

+7.1 V

4 ns

(Max)

0V

4 ns

(Max)

62.5 ns

+3.6 V

–3.5 V

7.1 V p-to-p

(Min)

7.1 V p-to-p

(Min)

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

2.1.4 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

Programmable Output

Impedance (Ω)

Supply

Voltage

Notes

Local bus interface utilities signals

25

42 (default)

OVDD = 3.3 V

1

PCI signals

25

2

42 (default)

DDR signal

20

GVDD = 2.5 V

TSEC/10/100 signals

42

LVDD = 2.5/3.3 V

DUART, system control, I2C, JTAG

42

OVDD = 3.3 V

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.

MPC8541E PowerQUICC™ III Integrated Communications Processor Hardware Specification, Rev. 4.2

Freescale Semiconductor

11

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