ZUSBOPTSC01ZAC datasheet(115/402 Pages) ZILOG

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PS024604-1005

P R E L I M I N A R Y

Timer Operating Modes

Z8FMC16100 Series Flash MCU

Product Specification

Timer Operating Modes

The timers can be configured to operate in the following eleven modes, each of which is

described in this section:

• ONE-SHOT mode

• TRIGGERED ONE-SHOT mode

• CONTINUOUS mode

• COUNTER mode

• COMPARATOR COUNTER mode

• PWM SINGLE OUTPUT mode

• PWM DUAL OUTPUT mode

• CAPTURE RESTART mode

• CAPTURE COMPARE mode

• COMPARE mode

• GATED mode

One-Shot Mode

In ONE-SHOT mode, the timer counts up to the 16-bit reload value stored in the Timer

Reload High and Low Byte registers. The Timer Input is the system clock. After reaching

this reload value, the timer generates an interrupt and the count value in the Timer High

and Low Byte registers is reset to 0001h. The timer is automatically disabled and stops

counting.

If the Timer Output alternate function is enabled, the Timer Output pin changes state for

one system clock cycle (from Low to High, then back to Low if TPOL = 0) at timer reload.

If the user chooses, the Timer Output can undergo a permanent state change upon One-

Shot time-out, as follows:

1. Set the TPOL bit in the Timer Control 1 Register to the start value before beginning

ONE-SHOT mode.

2. After starting the timer, set TPOL to the opposite value.

The steps for configuring a timer for ONE-SHOT mode and initiating a count are as fol-

lows:

1. Write to the Timer Control registers to:

a. Disable the timer.

b. Configure the timer for ONE-SHOT mode.

c. Set the prescale value.

ZUSBOPTSC01ZAC 数据表(PDF) 115 Page - Zilog, Inc.

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