z8f1621 ZiLOG Semiconductor, z8f1621 Datasheet - Page 92
z8f1621
Manufacturer Part Number
z8f1621
Description
High Performance 8-bit Microcontrollers
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z8F1621.pdf
(297 pages)
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Operation
PS019921-0308
System
Control
Clock
Timer
Block
Data
Input
Bus
Timer Operating Modes
The timers are 16-bit up-counters. Minimum time-out delay is set by loading the value
0001H
to 1. Maximum time-out delay is set by loading the value
High and Low Byte registers and setting the prescale value to 128. If the Timer reaches
FFFFH
The timers can be configured to operate in the following modes:
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. Upon reaching
the Reload value, the timer generates an interrupt and the count value in the Timer High
and Low Byte registers is reset to
stops counting.
Also, if the Timer Output alternate function is enabled, the Timer Output pin changes state
for one system clock cycle (from Low to High or from High to Low) upon timer Reload. If
it is desired to have the Timer Output make a permanent state change upon
Capture
Input
Input
Gate
, the timer rolls over to
into the Timer Reload High and Low Byte registers and setting the prescale value
Figure 11. Timer Block Diagram
Reload Register
PWM/Compare
16-Bit Counter
with Prescaler
Control
16-Bit
16-Bit
Timer
0000H
0001H
and continues counting.
. Then, the timer is automatically disabled and
Z8 Encore! XP
Timer Block
Timer Output
0000H
Interrupt,
Control
PWM,
and
Product Specification
into the Timer Reload
®
F64XX Series
Interrupt
Output
Timer
Timer
Timers
78
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