MPC8535E datasheet(87/126 Pages) FREESCALE

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GPIO

MPC8535E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 3

Freescale Semiconductor

2.18

GPIO

This section describes the DC and AC electrical specifications for the GPIO interface of the MPC8535E.

2.18.1

GPIO DC Electrical Characteristics

Table 65 provides the DC electrical characteristics for the GPIO interface.

2.18.2

GPIO AC Electrical Specifications

Table 66 provides the GPIO input and output AC timing specifications.

Figure 53 provides the AC test load for the GPIO.

Figure 53. GPIO AC Test Load

Table 65. GPIO DC Electrical Characteristics

Parameter

Symbol

Min

Max

Unit

High-level input voltage

VIH

2OVDD + 0.3

Low-level input voltage

VIL

– 0.3

0.8

Input current

(VIN

1 = 0 V or V

IN = VDD)

IIN

—±5

μA

High-level output voltage

(OVDD = min, IOH = –2 mA)

VOH

2.4

—

Low-level output voltage

(OVDD = min, IOL = 2 mA)

VOL

—0.4

Note:

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

Table 66. GPIO Input and Output AC Timing Specifications1

Characteristic

Symbol 2

Min

Unit

Notes

GPIO inputs—minimum pulse width

tPIWID

7.5

GPIO outputs—minimum pulse width

tGTOWID

—

Notes:

1. Input specifications are measured from the 50% level of the signal to the 50% level of the rising edge of CLKIN. Timings

are measured at the pin.

2. 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.

3. The minimum pulse width is a function of the MPX/Platform clock. The minimum pulse width must be greater than or equal

to 4 times the MPX/Platform clock period.

Output

Z0 = 50 Ω

OVDD/2

RL = 50 Ω

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