AT32UC3B164-AUT Atmel, AT32UC3B164-AUT Datasheet - Page 84

• Manufacturer Part Number: AT32UC3B164-AUT
• Description: IC MCU AVR32 64KB FLASH 48-TQFP
• Manufacturer: Atmel
• Series: AVR®32 UC3r

Specifications of AT32UC3B164-AUT

• Core Processor: AVR
• Core Size: 32-Bit
• Speed: 60MHz
• Connectivity: I²C, IrDA, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 28
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TQFP, 48-VQFP
• Controller Family/series: AT32UC3B
• No. Of I/o's: 28
• Ram Memory Size: 16KB
• Cpu Speed: 60MHz
• No. Of Timers: 1
• Rohs Compliant: Yes
• For Use With: ATSTK600-TQFP48 - STK600 SOCKET/ADAPTER 48-TQFPATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMR770-1008 - ISP 4PORT ATMEL AVR32 MCU SPIATEVK1101 - KIT DEV/EVAL FOR AVR32 AT32UC3B
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

11. Watchdog Timer (WDT)
11.1
11.2
11.3
11.4
11.4.1
11.4.2
11.4.3
32059I–06/2010
Features
Overview
Block Diagram
Product Dependencies
Power Management
Clocks
Debug Operation
Rev: 2.3.1.1
•
•
The Watchdog Timer (WDT) has a prescaler generating a time-out period. This prescaler is
clocked from the RC oscillator. The watchdog timer must be periodically reset by software within
the time-out period, otherwise, the device is reset and starts executing from the boot vector. This
allows the device to recover from a condition that has caused the system to be unstable.
Figure 11-1. WDT Block Diagram
In order to use this module, other parts of the system must be configured correctly, as described
below.
When the WDT is enabled, the WDT remains clocked in all sleep modes, and it is not possible to
enter Static mode.
The WDT can use the system RC oscillator (RCSYS) as clock source. This oscillator is always
enabled whenever these modules are active. Please refer to the Electrical Characteristics chap-
ter for the characteristic frequency of this oscillator (f
The WDT prescaler is frozen during debug operation, unless the On-Chip Debug (OCD) system
keeps peripherals running in debug operation.
Watchdog timer counter with 32-bit prescaler
Clocked from the system RC oscillator (RCSYS)
RCSYS
Prescaler
32-bit
EN
Watchdog
RC
Detector
).
CTRL
CLR
Watchdog Reset
AT32UC3B
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