MPC8349E datasheet(49/88 Pages) FREESCALE

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MPC8349E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 10

Freescale Semiconductor

Timers

14 Timers

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

14.1

Timer DC Electrical Characteristics

Table 43 provides the DC electrical characteristics for the MPC8349E timer pins, including TIN, TOUT,

TGATE, and RTC_CLK.

14.2

Timer AC Timing Specifications

Table 44 provides the timer input and output AC timing specifications.

Table 43. Timer DC Electrical Characteristics

Characteristic

Symbol

Condition

Min

Max

Unit

Input high voltage

VIH

2.0

OVDD +0.3

Input low voltage

VIL

–0.3

0.8

Input current

IIN

±5

μA

Output high voltage

VOH

IOH = –8.0 mA

2.4

—

Output low voltage

VOL

IOL = 8.0 mA

—

0.5

Output low voltage

VOL

IOL = 3.2 mA

—

0.4

Table 44. Timers Input AC Timing Specifications1

Characteristic

Symbol2

Min

Unit

Timers inputs—minimum pulse width

tTIWID

Notes:

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

Timings are measured at the pin.

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

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

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