MC9S08SF4 View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

MFG CO.

MC9S08SF4

8-Bit S08 Central Processor Unit (CPU)

Freescale Semiconductor 

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AC Characteristics

3.9.2 Timer/PWM (TPM) Module Timing

Synchronizer circuits determine the shortest input pulses that can be recognized or the fastest clock that

can be used as the optional external source to the timer counter. These synchronizers operate from the

current bus rate clock.

Table 10. TPM/MTIM Input Timing

Function

Symbol

Min

External clock frequency

fTCLK

dc

External clock period

tTCLK

4

External clock high time

tclkh

1.5

External clock low time

tclkl

1.5

Input capture pulse width for TPM

tICPW

1.5

Timer clock frequency

ftimer

—

Max

ftimer/4

—

—

—

—

40

Unit

MHz

tcyc

tcyc

tcyc

tcyc

MHz

tclkh

tText

TCLK

tclkl

Figure 16. Timer External Clock

TPMCHn

tICPW

TPMCHn

tICPW

Figure 17. Timer Input Capture Pulse

MC9S08SF4 Series MCU Data Sheet, Rev. 2

Freescale Semiconductor

19

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