EZ80L92AZ020EC Zilog, EZ80L92AZ020EC Datasheet - Page 79
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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Watchdog Timer
PS013014-0107
The Watchdog Timer (WDT) helps protect against corrupt or unreliable software, power
faults, and other system-level problems which may place the eZ80 CPU into unsuitable
operating states. The eZ80L92 MCU WDT features:
•
•
•
•
Figure 17
System Clock
RTC Clock
Four programmable time-out periods: 2
Two selectable WDT clock sources: the system clock or the real time clock source
(on-chip 32 kHz crystal oscillator or 50/60 Hz signal)
A selectable time-out response: a time-out can be configured to generate either a
RESET or a non-maskable interrupt (NMI)
A WDT time-out RESET indicator flag
illustrates the block diagram for the Watchdog Timer.
WDT_CLK
Figure 17. Watchdog Timer Block Diagram
Time-Out Compare Logic
{WDT_PERIOD}
Upcounter
28-Bit
18
, 2
22
, 2
25
, and 2
27
RESET
NMI to eZ80 CPU
WDT Control Logic
Control Register/
Reset Register
clock cycles
Product Specification
Data[7:0]
eZ80L92 MCU
Watchdog Timer
73
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