AT91SAM7SE256 ATMEL [ATMEL Corporation], AT91SAM7SE256 Datasheet - Page 32
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AT91SAM7SE256
Manufacturer Part Number
AT91SAM7SE256
Description
Product Description
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT91SAM7SE256.pdf
(47 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT91SAM7SE256-AU
Manufacturer:
ATMEL
Quantity:
165
9.4
32
Advanced Interrupt Controller
AT91SAM7SE512/256/32 Preliminary
Figure 9-3.
• Controls the interrupt lines (nIRQ and nFIQ) of an ARM Processor
• Individually maskable and vectored interrupt sources
• 8-level Priority Controller
• Vectoring
• Protect Mode
• Fast Forcing
• General Interrupt Mask
– 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
– Drives the normal interrupt nIRQ of the processor
– Handles priority of the interrupt sources
– Higher priority interrupts can be served during service of lower priority interrupt
– Optimizes interrupt service routine branch and execution
– One 32-bit vector register per interrupt source
– Interrupt vector register reads the corresponding current interrupt vector
– Easy debugging by preventing automatic operations
– Permits redirecting any interrupt source on the fast interrupt
– Provides processor synchronization on events without triggering an interrupt
sources
Power Management Controller Block Diagram
MAINCK
MAINCK
PLLCK
PLLCK
SLCK
SLCK
PLLCK
Master Clock Controller
Programmable Clock Controller
/1,/2,/4,...,/64
Prescaler
USB Clock Controller
/1,/2,/4,...,/64
ON/OFF
Divider
/1,/2,/4
Prescaler
Processor
Controller
Idle Mode
Clock Controller
Clock
Peripherals
ON/OFF
PCK
int
MCK
periph_clk[2..14]
pck[0..2]
usb_suspend
UDPCK
6222ES–ATARM–15-Dec-09