MC68HC908QL4 Datasheet, PDF (217/226 Pages) Motorola, Inc – Microcontrollers

17.14 Timer Interface Module Characteristics
Timer Interface Module Characteristics
Characteristic
Symbol
Min
Max
Timer input capture pulse width⁽¹⁾
Timer input capture period
Timer input clock pulse width⁽¹⁾
t_TH, t_TL
2
—
t_TLTL
Note⁽²⁾
—
t_TCL, t_TCH
t_cyc + 5
—
1. Values are based on characterization results, not tested in production.
2. The minimum period is the number of cycles it takes to execute the interrupt service routine plus 1 t_cyc.
Unit
t_cyc
t_cyc
ns
INPUT CAPTURE
RISING EDGE
INPUT CAPTURE
FALLING EDGE
INPUT CAPTURE
BOTH EDGES
TCLK
t_TLTL
t_TH
t_TLTL
t_TL
t_TLTL
t_TH
t_TL
t_TCH
t_TCL
Figure 17-11. Input Capture Timing
MC68HC908QL4 Data Sheet, Rev. 7
Freescale Semiconductor
217