AT91SAM9260B-QU Atmel, AT91SAM9260B-QU Datasheet - Page 101

• Manufacturer Part Number: AT91SAM9260B-QU
• Description: IC ARM9 MCU 208-PQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9260B-QU

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR, WDT
• Number Of I /o: 96
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: ROM
• Ram Size: 24K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 208-MQFP, 208-PQFP
• Package: 208PQFP
• Device Core: ARM926EJ-S
• Family Name: 91S
• Maximum Speed: 180 MHz
• Operating Supply Voltage: 1.8|3.3 V
• Data Bus Width: 32 Bit
• Number Of Programmable I/os: 96
• Interface Type: EBI/Ethernet/SPI/TWI/UART/USART/USB
• On-chip Adc: 4-chx10-bit
• Number Of Timers: 6
• Processor Series: AT91SAMx
• Core: ARM926EJ-S
• Data Ram Size: 8 KB
• Maximum Clock Frequency: 180 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: AT91SAM-ICE, AT91-ISP, AT91SAM9260-EK
• Minimum Operating Temperature: - 40 C
• Cpu Family: AT91
• Device Core Size: 32b
• Frequency (max): 180MHz
• Total Internal Ram Size: 8KB
• # I/os (max): 96
• Number Of Timers - General Purpose: 6
• Operating Supply Voltage (typ): 1.8/3.3V
• Operating Supply Voltage (max): 1.95/3.6V
• Operating Supply Voltage (min): 1.65/3V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 208
• Package Type: PQFP
• For Use With: AT91SAM9260-EK - KIT EVAL FOR AT91SAM9260AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

15. Watchdog Timer (WDT)
15.1
15.2
15.3
Figure 15-1. Watchdog Timer Block Diagram
6221I–ATARM–17-Jul-09
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.
• 16-bit key-protected only-once-Programmable Counter
• Windowed, prevents the processor being in a dead-lock on the watchdog access
WDT_MR
WDD
WDERR
<= WDD
set
reset
reload
WDT_MR
WDV
12-bit Down
1
WDUNF
Counter
Current
Value
= 0
reset
set
0
1/128
reload
WDRSTEN
WDT_MR
WDT_MR
WDFIEN
SLCK
AT91SAM9260
(to Reset Controller)
wdt_int
wdt_fault
101