AT91SAM7S64 datasheet(21/491 Pages) ATMEL

21 / 491 page

6070B–ATARM–25-Feb-05

AT91SAM7S64 Preliminary

Figure 9-4.

Power Management Controller Block Diagram

9.5

Advanced Interrupt Controller

• Controls the interrupt lines (nIRQ and nFIQ) of an ARM Processor

• Individually maskable and vectored interrupt sources

– Source 0 is reserved for the Fast Interrupt Input (FIQ)

– Source 1 is reserved for system peripherals (RTT, PIT, EFC, PMC, DBGU, etc.)

– Other sources control the peripheral interrupts or external interrupts

– Programmable edge-triggered or level-sensitive internal sources

– Programmable positive/negative edge-triggered or high/low level-sensitive external

sources

• 8-level Priority Controller

– Drives the normal interrupt of the processor

– Handles priority of the interrupt sources

– Higher priority interrupts can be served during service of lower priority interrupt

• Vectoring

– Optimizes interrupt service routine branch and execution

– One 32-bit vector register per interrupt source

– Interrupt vector register reads the corresponding current interrupt vector

•Protect Mode

– Easy debugging by preventing automatic operations

•Fast Forcing

– Permits redirecting any interrupt source on the fast interrupt

• General Interrupt Mask

– Provides processor synchronization on events without triggering an interrupt

MCK

periph_clk[2..14]

int

UDPCK

usb_suspend

SLCK

MAINCK

PLLCK

Prescaler

/1,/2,/4,...,/64

PCK

Processor

Clock

Controller

Idle Mode

Master Clock Controller

Peripherals

Clock Controller

ON/OFF

USB Clock Controller

ON/OFF

SLCK

MAINCK

PLLCK

Prescaler

/1,/2,/4,...,/64

Programmable Clock Controller

PLLCK

Divider

/1,/2,/4

pck[0..2]

AT91SAM7S64 Datasheet(PDF) 21 Page - ATMEL Corporation

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