EZ80L92AZ020EC Zilog, EZ80L92AZ020EC Datasheet - Page 84
EZ80L92AZ020EC
Manufacturer Part Number
EZ80L92AZ020EC
Description
IC WEBSERVER 20MHZ 100LQFP
Manufacturer
Zilog
Datasheet
1.EZ80L92AZ020SG.pdf
(231 pages)
Specifications of EZ80L92AZ020EC
Processor Type
eZ80
Features
High Speed, Single-Cycle Instruction-Fetch
Speed
20MHz
Voltage
3.3V
Mounting Type
Surface Mount
Package / Case
100-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
269-3167
EZ80L92AZ020EC
EZ80L92AZ020EC
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PS013014-0107
of the timer is achieved by loading
0000h
0000h
The time-out period of the PRT is returned by the following equation:
To calculate the time-out period with the above equation when using an initial value of
0000h
Minimum time-out duration is 4 times longer than the input clock period and is generated
by setting the clock divider ratio to 1:4 and the reload value to
duration is 2
setting the clock divider ratio to 1:256 and the reload value to
SINGLE PASS Mode
In SINGLE PASS mode, when the end-of-count value,
the timer is disabled, and the PRT_EN bit resets to 0. To restart the timer, the CPU must
reenable the timer by setting the PRT_EN bit to 1. An example of a PRT operating in
SINGLE PASS mode is illustrated in
in
PRT Time-Out Period
t
t
CNTH
CNTL
IOWRN
CLKEN
Table
CLK
IRQ
7:0]
7:0]
, because the timer first rolls over to
.
, enter a reload value of 65536 (
29.
24
(16,777,216) times longer than the input clock period and is generated by
Figure 19. PRT SINGLE PASS Mode Operation Example
0
=
4
Clock Divider Ratio x Reload Value
System Clock Frequency
0001h
3
Figure
FFFFh
. Maximum duration is achieved by loading
FFFFh
19. Timer register information is indicated
+ 1).
0
2
and then continues counting down to
0000h
1
0001h
0000h
, is reached, counting halts,
Programmable Reload Timers
Product Specification
. Maximum time-out
.
0
eZ80L92 MCU
78
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