M68HC05 datasheet(98/118 Pages) FREESCALE

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Electrical Specifications

MC68HC05C9A Advance Information Data Sheet, Rev. 4.1

Freescale Semiconductor

12.7 5.0-Vdc Control Timing

Characteristic(1)

1. V

DD = 5.0 Vdc ± 10%, VSS = 0 Vdc, TA = –40 to +85 °C, unless otherwise noted

Symbol

Min

Max

Unit

Frequency of operation

Crystal

External clock

fOSC

—

4.2

MHz

Internal pperating frequency (fOSC ÷ 2)

Crystal

External clock

fOP

—

2.1

MHz

Cycle time

tCYC

480

—

Crystal oscillator startup time

tOXOV

—100

Stop recovery startup time (crystal oscillator)

tILCH

—100

RESET pulse width

tRL

1.5

—

tCYC

Timer

Resolution(2)

Input capture pulse width

Input capture pulse period

2. Because a 2-bit prescaler in the timer must count four internal cycles (t

CYC), this is the limiting minimum factor in determining

the timer resolution.

tRESL

tTH, tTL

tTLTL

4.0

125

(3)

3. The minimum period t

TLTL should not be less than the number of cycle times it takes to execute the capture interrupt service

routine plus

24 t

CYC.

—

tCYC

Interrupt pulse width low (edge-triggered)

tILIH

125

—

Interrupt pulse period

tILIL

(4)

4. The minimum t

ILIL should not be less than the number of cycle times it takes to execute the interrupt service routine plus

19 t

CYC.

—

tCYC

OSC1 pulse width

tOH,tOL

—

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