Z8FMC04100 ZILOG [Zilog, Inc.], Z8FMC04100 Datasheet - Page 116

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

94
Z8 Encore!
Product Specification
General-Purpose Timer
®
Motor Control Flash MCUs
2. Write to the Timer High and Low Byte registers to set the starting count value.
3. Write to the Timer Reload High and Low Byte registers to set the reload value.
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 (Start Value is typically = 1):
Triggered One-Shot Mode
In TRIGGERED ONE-SHOT mode, the timer operates as follows:
1. The Timer idles until a trigger is received. The timer trigger is taken from the Timer
2. Following the trigger event, the timer counts system clocks up to the 16-bit reload
3. Upon reaching the reload value, the timer outputs a pulse on the Timer Output pin,
4. The timer idles until the next trigger event. Trigger events that occur while the timer is
The steps for configuring Timer 0 in TRIGGERED ONE-SHOT mode and initiating oper-
ation are as follows:
1. Write to the Timer Control registers to:
One-Shot Mode Time-Out Period(s) =
d. If using the Timer Output alternate function, set the initial output level (High or
e. Set the interrupt mode.
to the relevant interrupt registers.
Timer Output alternate function.
Input pin. The
occurs on the rising edge or the falling edge of the Timer Input signal.
value stored in the Timer Reload High and Low Byte registers.
generates an interrupt, and resets the count value in the Timer High and Low Byte reg-
isters to
bit also sets the polarity of the output pulse.
responding to a previous trigger are ignored.
a. Disable the timer.
b. Configure the timer for TRIGGERED ONE-SHOT mode.
Low) using the
0001h
TPOL
. The duration of the output pulse is a single system clock. The
TPOL
bit in the Timer Control 1 Register selects whether the trigger
P R E L I M I N A R Y
bit.
(Reload Value – Start Value + 1) x Prescaler
System Clock Frequency (Hz)
PS024604-1005
TPOL