MC68HC16Z1CAG16 Datasheet, PDF (340/500 Pages) Freescale Semiconductor, Inc – M68HC16Z Series users manual

Freescale Semiconductor, Inc.
PHI1¹
PHI1/4²
EXT PIN (PAI)
TCNT
$FFFE
$FFFF
$0000
PACNT
$77
$78
NOTES:
1. PHI1 HAS THE SAME FREQUENCY AS THE SYSTEM CLOCK; HOWEVER, IT DOES NOT HAVE THE SAME TIMING.
2. TCNT COUNTS AS A RESULT OF PHI1/4; PACNT COUNTS WHEN TCNT OVERFLOWS FROM $FFFF TO $0000 AND THE CONDITIONED
PAI SIGNAL IS ASSERTED.
PULSE ACCUM TOF GATED MODE
Figure A-27 Pulse Accumulator — Using TOF as Gated Mode Clock
PHI1¹
PHI1/2¹
PWMCNT[7:0]²
$FF
$00
$01
$02
EXT PIN (PMWx)
NOTES:
1. PHI1 IS THE SAME FREQUENCY AS THE SYSTEM CLOCK; HOWEVER, IT DOES NOT HAVE THE SAME TIMING.
2. WHEN THE COUNTER ROLLS OVER FROM $FF TO $00, THE PWM PIN IS SET TO LOGIC LEVEL ONE.
WHEN THE COUNTER EQUALS THE PWM REGISTER, THE PWM PIN IS CLEARED TO A LOGIC LEVEL ZERO.
Figure A-28 PWMx (PWMx Register = 01, Fast Mode)
PWMx FAST MODE
A-56
ELECTRICAL CHARACTERISTICS
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M68HC16 Z SERIES
USER’S MANUAL