mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 358

• Manufacturer Part Number: mc68hc916y3
• Description: Mc68hc16y3 16 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

A-32
MOTOROLA
EXT PIN (PMWx)
NOTES:
EXT PIN (PAI)
PWMCNT[7:0]
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.
NOTES:
Figure A-27 Pulse Accumulator — Using TOF as Gated Mode Clock
PHI1/4
PACNT
PHI1/2
PHI1
TCNT
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.
PHI1
WHEN THE COUNTER EQUALS THE PWM REGISTER, THE PWM PIN IS CLEARED TO A LOGIC LEVEL ZERO.
1
2
1
1
2
Figure A-28 PWMx (PWMx Register = 01, Fast Mode)
$FFFE
$FF
Freescale Semiconductor, Inc.
For More Information On This Product,
$00
Go to: www.freescale.com
$FFFF
$01
$77
$0000
$78
$02
MC68HC16Y3/916Y3
USER’S MANUAL
PULSE ACCUM TOF GATED MODE
PWMx FAST MODE