EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 146
EZ80F91MCU
Manufacturer Part Number
EZ80F91MCU
Description
eZ80Acclaim-TM Flash Microcontrollers
Manufacturer
ZILOG [Zilog, Inc.]
Datasheet
1.EZ80F91MCU.pdf
(396 pages)
- Current page: 146 of 396
- Download datasheet (5Mb)
Programmable Reload Timers
PS019209-0504
Programmable Reload Timers Overview
The eZ80F91 device features four programmable reload timers. The core of each
timer is a 16-bit downcounter. In addition, each timer features a selectable clock
source, adjustable prescaling and can operate in either SINGLE PASS or CON-
TINUOUS mode.
In addition to the basic timer functionality, some of the timers support specialty
modes that perform event counting, input capture, output compare, and PWM
generation functions. PWM mode supports four individually-configurable outputs
and a power trip function.
Each of the 4 timers available on the eZ80F91 device can be controlled individu-
ally. They do not share the same counters, reload registers, control registers, or
interrupt signals. A simplified block diagram of a programmable reload timer is
illustrated in Figure 25.
Each timer features its own interrupt, which is triggered either by the timer reach-
ing zero or after a successful comparison occurs. As with the other eZ80F91 inter-
rupts, the priority is fully programmable.
Figure 25. Programmable Reload Timer Block Diagram
SCLK
RTC CLK
R
E
O
A
D
L
ECx
DIV
EOC
Down Counter
M
U
X
IRQ Control
CONTROL
IC
16-Bit
IRQ
OC
PWR Trip
PWM
P R E L I M I N A R Y
16
Input Capture
Registers
Output Compare
Comparator
Registers
Control
PWM
ICx
16
Programmable Reload Timers
Product Specification
PWM
OCx
eZ80F91 MCU
127
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