MPC8378E datasheet(22/127 Pages) FREESCALE

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MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

DUART

Figure 6 provides the AC test load for the DDR bus.

Figure 6. DDR AC Test Load

7DUART

This section describes the DC and AC electrical specifications for the DUART interface of the

MPC8378E.

7.1

DUART DC Electrical Characteristics

Table 22 provides the DC electrical characteristics for the DUART interface of the device.

7.2

DUART AC Electrical Specifications

Table 23 provides the AC timing parameters for the DUART interface of the device.

Table 22. DUART DC Electrical Characteristics

Parameter

Symbol

Min

Max

Unit

High-level input voltage

VIH

2OVDD + 0.3

Low-level input voltage OVDD

VIL

–0.3

0.8

High-level output voltage,

IOH = –100 μA

VOH

OVDD – 0.2

—

Low-level output voltage,

IOL = 100 μA

VOL

—0.2

Input current,

(0 V

≤V

IN ≤ OVDD)

IIN

—±30

μA

Note:

• The symbol VIN, in this case, represents the OVIN symbol referenced in Table 2.

Table 23. DUART AC Timing Specifications

Parameter

Value

Unit

Notes

Minimum baud rate

256

baud

—

Maximum baud rate

> 1,000,000

baud

Oversample rate

—

Notes:

1 Actual attainable baud rate will be limited by the latency of interrupt processing.

2 The middle of a start bit is detected as the 8th sampled 0 after the 1-to-0 transition of the start bit. Subsequent bit values are

sampled each 16th sample.

Output

Z0 = 50 Ω

RL = 50 Ω

GVDD/2

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