MC68HC16Z1 Datasheet, PDF (338/500 Pages) Freescale Semiconductor, Inc – M68HC16Z Series

Freescale Semiconductor, Inc.
PHI1¹
PAEN
EXT PIN (PAI)
A²
B³
PACNT
$FF
$00
PAIF⁴
PAOVF⁵
NOTES:
1. PHI1 IS THE SAME FREQUENCY AS THE SYSTEM CLOCK; HOWEVER, IT DOES NOT HAVE THE SAME TIMING.
2. A = PAI SIGNAL AFTER THE SYNCHRONIZER.
3. B = “A” AFTER THE DIGITAL FILTER.
4. THE EXTERNAL LEADING EDGE CAUSES THE PULSE ACCUMULATOR TO INCREMENT AND THE PAIF FLAG TO BE SET.
5. THE COUNTER TRANSITION FROM $FF TO $00 CAUSES THE PAOVF FLAG TO BE SET.
PULSE ACCUM ECM LEAD EDGE
Figure A-25 Pulse Accumulator — Event Counting Mode (Leading Edge)
A-54
ELECTRICAL CHARACTERISTICS
For More Information On This Product,
Go to: www.freescale.com
M68HC16 Z SERIES
USER’S MANUAL