AT91SAM9260 ATMEL Corporation, AT91SAM9260 Datasheet - Page 30

• Manufacturer Part Number: AT91SAM9260
• Description: AT91 ARM Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

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Figure 9-3.
9.6
9.7
9.8
9.9
9.10
30
Periodic Interval Timer
Watchdog Timer
Real-time Timer
General-purpose Back-up Registers
Advanced Interrupt Controller
AT91SAM9260 Preliminary
AT91SAM9260 Power Management Controller Block Diagram
PLLBCK
PLLACK
MAINCK
SLCK
• Includes a 20-bit Periodic Counter, with less than 1 µs accuracy
• Includes a 12-bit Interval Overlay Counter
• Real Time OS or Linux
• 16-bit key-protected only-once-Programmable Counter
• Windowed, prevents the processor being in a dead-lock on the watchdog access
• Four 32-bit backup general-purpose registers
• Controls the interrupt lines (nIRQ and nFIQ) of the ARM Processor
• Thirty-two individually maskable and vectored interrupt sources
Master Clock Controller
– Real-time Timer 32-bit free-running back-up Counter
– Integrates a 16-bit programmable prescaler running on slow clock
– Alarm Register capable of generating a wake-up of the system through the
– Source 0 is reserved for the Fast Interrupt Input (FIQ)
– Source 1 is reserved for system peripherals (PIT, RTT, PMC, DBGU, etc.)
Shutdown Controller
/1,/2,/4,...,/64
Prescaler
MAINCK
PLLBCK
PLLACK
PLLBCK
SLCK
Programmable Clock Controller
/1,/2,/3,/4
®
Divider
/Windows CE
USB Clock Controller
Divider
/1,/2,/4
/1,/2,/4,...,/64
Prescaler
®
Clock Controller
Processor
Controller
Idle Mode
compliant tick generator
ON/OFF
ON/OFF
Clock
Peripherals
ON/OFF
PCK
int
MCK
periph_clk[..]
pck[..]
UDPCK
UHPCK
6221DS–ATARM–22-Sep-06