Atmel Evaluation Kit AT91SAM9260-EK AT91SAM9260-EK データシート
製品コード
AT91SAM9260-EK
27
SAM9260 [SUMMARY]
6221LS–ATARM–15-Oct-12
Figure 9-3. SAM9260 Power Management Controller Block Diagram
9.6
Periodic Interval Timer
z
Includes a 20-bit Periodic Counter, with less than 1 µs accuracy
z
Includes a 12-bit Interval Overlay Counter
z
Real Time OS or Linux
®
/Windows CE
®
compliant tick generator
9.7
Watchdog Timer
z
16-bit key-protected only-once-Programmable Counter
z
Windowed, prevents the processor being in a dead-lock on the watchdog access
9.8
Real-time Timer
z
Real-time Timer 32-bit free-running back-up Counter
z
Integrates a 16-bit programmable prescaler running on slow clock
z
Alarm Register capable of generating a wake-up of the system through the Shutdown Controller
9.9
General-purpose Back-up Registers
z
Four 32-bit backup general-purpose registers
9.10 Advanced Interrupt Controller
z
Controls the interrupt lines (nIRQ and nFIQ) of the ARM Processor
z
Thirty-two individually maskable and vectored interrupt sources
z
Source 0 is reserved for the Fast Interrupt Input (FIQ)
z
Source 1 is reserved for system peripherals (PIT, RTT, PMC, DBGU, etc.)
z
Programmable Edge-triggered or Level-sensitive Internal Sources
z
Programmable Positive/Negative Edge-triggered or High/Low Level-sensitive
z
Three External Sources plus the Fast Interrupt signal
MCK
periph_clk[..]
int
SLCK
MAINCK
PLLACK
PLLACK
Prescaler
/1,/2,/4,...,/64
PCK
Processor
Clock
Controller
Idle Mode
Master Clock Controller
Peripherals
Clock Controller
ON/OFF
PLLBCK
Divider
/1,/2,/4
/1,/2,/4
USB Clock Controller
SLCK
MAINCK
PLLACK
Prescaler
/1,/2,/4,...,/64
Programmable Clock Controller
PLLBCK
Divider
/1,/2,/4
/1,/2,/4
pck[..]
PLLBCK
UDPCK
UHPCK
UHPCK
ON/OFF
ON/OFF