Z8FMC04100 ZILOG [Zilog, Inc.], Z8FMC04100 Datasheet - Page 118

• Manufacturer Part Number: Z8FMC04100
• Description: Z8 Encore-R Motor Control Flash MCUs
• Manufacturer: ZILOG [Zilog, Inc.]

96
Z8 Encore!
Product Specification
General-Purpose Timer
Caution:
Caution:
®
Motor Control Flash MCUs
2. Write to the Timer High and Low Byte registers to set the starting count value (usually
3. Write to the Timer Reload High and Low Byte registers to set the reload period.
4. If appropriate, enable the timer interrupt and set the timer interrupt priority by writing
5. If using the Timer Output function, configure the associated GPIO port pin for the
6. Write to the Timer Control 1 Register to enable the timer and initiate counting.
The timer period is calculated by the following equation:
If an initial starting value other than
registers, use the ONE-SHOT mode equation to determine the first time-out period.
Counter and Comparator Counter Modes
In COUNTER mode, the timer counts input transitions from a GPIO port pin. The Timer
Input is taken from the associated GPIO port pin. The
Register selects whether the count occurs on the rising edge or the falling edge of the
Timer Input signal. In COUNTER mode, the prescaler is disabled.
In COMPARATOR COUNTER mode, the timer counts output transitions from an analog
comparator output. Timer 0 takes its input from the output of the comparator. The
in the Timer Control 1 Register selects whether the count occurs on the rising edge or the
falling edge of the comparator output signal. In COMPARATOR COUNTER mode, the
prescaler is disabled.
Continuous Mode Time-Out Period(s) =
The input frequency of the Timer Input signal must not exceed one-fourth the system
clock frequency.
The frequency of the comparator output signal must not exceed one-fourth the system
clock frequency.
d. If using the Timer Output alternate function, set the initial output level (High or
0001h
timer reload in CONTINUOUS mode, counting begins at the reset value of
to the relevant interrupt registers.
Timer Output alternate function.
Low) via
). This setting only affects the first pass in CONTINUOUS mode. After the first
TPOL
.
P R E L I M I N A R Y
0001h
System Clock Frequency (Hz)
is loaded into the Timer High and Low Byte
Reload Value x Prescaler
TPOL
bit in the Timer Control 1
PS024604-1005
0001h
TPOL
.
bit