MPC8379E datasheet(65/116 Pages) FREESCALE

65 / 116 page

MPC8379E PowerQUICC II Pro Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

Timers

16 Timers

This section describes the DC and AC electrical specifications for the timers of the MPC8379E.

16.1

Timers DC Electrical Characteristics

Table 60 provides the DC electrical characteristics for the device timers pins, including TIN, TOUT,

TGATE, and RTC_CLK.

16.2

Timers AC Timing Specifications

Table 61 provides the timers input and output AC timing specifications.

Deterministic jitter

fC3dB =fBAUD/10

USATA_TXDJfB/10

——

0.35

UIp-p

Deterministic jitter

fC3dB =fBAUD/500

USATA_TXDJfB/500

——

0.42

UIp-p

Deterministic jitter

fC3dB =fBAUD/1667

USATA_TXDJfB/1667

——

0.35

UIp-p

Note:

1 Measured at Tx output pins peak to peak phase variation, random data pattern.

Table 60. Timers DC Electrical Characteristics

Parameter

Condition

Symbol

Min

Max

Unit

Output high voltage

IOH = –6.0 mA

VOH

2.4

—

Output low voltage

IOL = 6.0 mA

VOL

—0.5

Output low voltage

IOL = 3.2 mA

VOL

—0.4

Input high voltage

—

VIH

2.0

OVDD + 0.3

Input low voltage

—

VIL

–0.3

0.8

Input current

0 V

≤ V

IN ≤ OVDD

IIN

—

± 30

μA

Table 61. Timers Input AC Timing Specifications 1

Parameter

Symbol 2

Min

Unit

Timers inputs—minimum pulse width

tTIWID

Note:

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

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

Table 59. Gen 2i/3G Receiver AC Specifications (continued)

Parameter

Symbol

Min

Typical

Max

Units

Notes

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