AT32UC3B0128-A2UR Atmel, AT32UC3B0128-A2UR Datasheet - Page 84
![MCU AVR32 128K FLASH 64-TQFP](/photos/6/81/68127/313-64-vqfp_sml.jpg)
AT32UC3B0128-A2UR
Manufacturer Part Number
AT32UC3B0128-A2UR
Description
MCU AVR32 128K FLASH 64-TQFP
Manufacturer
Atmel
Series
AVR®32 UC3r
Datasheet
1.AT32UC3B164-AUR.pdf
(680 pages)
Specifications of AT32UC3B0128-A2UR
Package / Case
64-TQFP, 64-VQFP
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Operating Temperature
-40°C ~ 85°C
Speed
60MHz
Number Of I /o
44
Core Processor
AVR
Program Memory Type
FLASH
Ram Size
32K x 8
Program Memory Size
128KB (128K x 8)
Data Converters
A/D 8x10b
Oscillator Type
Internal
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Connectivity
I²C, IrDA, SPI, SSC, UART/USART, USB
Core Size
32-Bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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11. Watchdog Timer (WDT)
11.1
11.2
11.3
11.4
11.4.1
11.4.2
11.4.3
32059J–12/2010
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
84
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