Z8F082A28100KIT ZILOG [Zilog, Inc.], Z8F082A28100KIT Datasheet - Page 82

• Manufacturer Part Number: Z8F082A28100KIT
• Description: Z8 Encore XP-R F08xA Series with eXtended Peripherals
• Manufacturer: ZILOG [Zilog, Inc.]

PS024705-0405
1. Write to the Timer Control register to:
2. Write to the Timer High and Low Byte registers to set the starting count value
3. Write to the PWM High and Low Byte registers to set the PWM value.
4. Write to the Timer Reload High and Low Byte registers to set the Reload value (PWM
5. If appropriate, enable the timer interrupt and set the timer interrupt priority by writing
6. Configure the associated GPIO port pin for the Timer Output alternate function.
7. Write to the Timer Control register to enable the timer and initiate counting.
The PWM period is represented by the following equation:
If an initial starting value other than
registers, use the ONE-SHOT mode equation to determine the first PWM time-out period.
If TPOL is set to 0, the ratio of the PWM output High time to the total period is repre-
sented by:
PWM Output High Time Ratio (%)
If TPOL is set to 1, the ratio of the PWM output High time to the total period is repre-
sented by:
PWM Dual Output Mode
In PWM DUAL OUTPUT mode, the timer outputs a Pulse-Width Modulated (PWM) out-
put signal pair (basic PWM signal and its complement) through two GPIO Port pins. The
timer input is the system clock. The timer first counts up to the 16-bit PWM match value
PWM Output High Time Ratio (%)
PWM Period (s)
–
–
–
–
(typically
reset in PWM mode, counting always begins at the reset value of
period). The Reload value must be greater than the PWM value.
to the relevant interrupt registers.
Disable the timer
Configure the timer for PWM mode.
Set the prescale value.
Set the initial logic level (High or Low) and PWM High/Low transition for the
Timer Output alternate function.
0001H
=
). This only affects the first pass in PWM mode. After the first timer
--------------------------------------------------------------------------- -
System Clock Frequency (Hz)
Reload Value
P R E L I M I N A R Y
0001H
=
=
×
Reload Value PWM Value
----------------------------------------------------------------------- -
Prescale
--------------------------------- -
Reload Value
PWM Value
is loaded into the Timer High and Low Byte
Reload Value
Z8 Encore! XP
–
×
100
Product Specification
0001H
®
×
F08xA Series
100
.
Timers
64