ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 267
ATSAM3X4EA-AU
Manufacturer Part Number
ATSAM3X4EA-AU
Description
ARM Microcontrollers - MCU QFP144,GREEN, IND TEMP, MRL A
Manufacturer
Atmel
Datasheet
1.ATSAM3X8EA-AU.pdf
(1467 pages)
Specifications of ATSAM3X4EA-AU
Rohs
yes
Core
ARM Cortex M3
Processor Series
SAM3X
Data Bus Width
32 bit
Maximum Clock Frequency
84 MHz
Program Memory Size
256 KB
Data Ram Size
64 KB
On-chip Adc
Yes
Operating Supply Voltage
2.4 V to 3.6 V
Operating Temperature Range
- 40 C to +85 C
Package / Case
LQFP-144
Mounting Style
SMD/SMT
Factory Pack Quantity
60
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17. Watchdog Timer (WDT)
17.1
17.2
17.3
Figure 17-1. Watchdog Timer Block Diagram
11057B–ATARM–28-May-12
11057B–ATARM–28-May-12
Description
Embedded Characteristics
Block Diagram
WDRSTT
WDT_CR
read WDT_SR
or
reset
write WDT_MR
The Watchdog Timer can be used to prevent system lock-up if the software becomes trapped in
a deadlock. It features a 12-bit down counter that allows a watchdog period of up to 16 seconds
(slow clock at 32.768 kHz). It can generate a general reset or a processor reset only. In addition,
it can be stopped while the processor is in debug mode or idle mode.
• 12-bit Key-protected Programmable Counter
• Provides Reset or Interrupt Signals to the System
• Counter May Be Stopped While the Processor is in Debug State or in Idle Mode
• AMBA
WDT_MR
– Interfaces to the ARM
WDD
WDERR
™
<= WDD
-compliant Interface
set
reset
reload
WDT_MR
WDV
12-bit Down
1
WDUNF
Counter
Current
Value
= 0
®
reset
set
Advanced Peripheral Bus
0
1/128
reload
WDRSTEN
WDT_MR
WDT_MR
WDFIEN
SLCK
(to Reset Controller)
wdt_int
wdt_fault
SAM3X/A
SAM3X/A
267
267
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