MPC8544E datasheet(61/117 Pages) FREESCALE

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MPC8544E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 5

Freescale Semiconductor

PCI

14.2

GPIO AC Electrical Specifications

Table 54 provides the GPIO input and output AC timing specifications.

Figure 40 provides the AC test load for the GPIO.

Figure 40. GPIO AC Test Load

15 PCI

This section describes the DC and AC electrical specifications for the PCI bus of the MPC8544E.

15.1

PCI DC Electrical Characteristics

Table 55 provides the DC electrical characteristics for the PCI interface.

Table 54. GPIO Input AC Timing Specifications

Parameter

Symbol

Typ

Unit

Notes

GPIO inputs—minimum pulse width

tPIWID

Note:

1. GPIO inputs and outputs are asynchronous to any visible clock. GPIO outputs should be synchronized before use by any

external synchronous logic. GPIO inputs are required to be valid for at least tPIWID ns to ensure proper operation.

Table 55. PCI DC Electrical Characteristics 1

Parameter

Symbol

Min

Max

Unit

Notes

High-level input voltage

VIH

2OVDD + 0.3

—

Low-level input voltage

VIL

–0.3

0.8

—

Input current (VIN = 0 V or VIN = VDD)IIN

—±5

μA2

High-level output voltage (OVDD = min, IOH = –2mA)

VOH

2.4

—

Low-level output voltage (OVDD = min, IOL = 2 mA)

VOL

—0.4

—

Notes:

1. Ranges listed do not meet the full range of the DC specifications of the PCI 2.2 Local Bus Specifications.

2. Note that the symbol VIN, in this case, represents the OVIN symbol referenced in Table 1 and Table 2.

Output

Z0 = 50 Ω

OVDD/2

RL = 50 Ω

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