MPC8309EC datasheet(45/82 Pages) FREESCALE

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MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0

Freescale Semiconductor

Timers

17 Timers

This section describes the DC and AC electrical specifications for the timers of the MPC8309.

17.1

Timer DC Electrical Characteristics

Table 45 provides the DC electrical characteristics for the MPC8309 timer pins, including TIN, TOUT,

TGATE, and RTC_PIT_CLK.

17.2

Timer AC Timing Specifications

Table 46 provides the timer input and output AC timing specifications.

Figure 34 provides the AC test load for the timers.

Figure 34. Timers AC Test Load

Table 45. Timer DC Electrical Characteristics

Characteristic

Symbol

Condition

Min

Max

Unit

Output high voltage

VOH

IOH =–6.0mA

2.4

—

Output low voltage

VOL

IOL =6.0 mA

—

0.5

Output low voltage

VOL

IOL =3.2 mA

—

0.4

Input high voltage

VIH

—2.0

OVDD +0.3

Input low voltage

VIL

—–0.3

0.8

Input current

IIN

0 V

 V

IN  OVDD

—

±5

A

Table 46. Timer Input AC Timing Specifications1

Characteristic

Symbol2

Min

Unit

Timers inputs—minimum pulse width

tTIWID

Notes:

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

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 any

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

Output

Z0 = 50 

OVDD/2

RL = 50 

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