at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 29

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

9.5
9.6
9.7
6249D–ATARM–20-Dec-07
Power Management Controller
Periodic Interval Timer
Watchdog Timer
Figure 9-3.
• Provides:
• Five flexible operating modes:
• 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 Counter, programmable only once
– the Processor Clock PCK
– the Master Clock MCK, in particular to the Matrix and the memory interfaces
– the USB Device Clock UDPCK
– the USB Host Clock UHPCK
– independent peripheral clocks, typically at the frequency of MCK
– four programmable clock outputs: PCK0 to PCK3
– Normal Mode with processor and peripherals running at a programmable frequency
– Idle Mode with processor stopped while waiting for an interrupt
– Slow Clock Mode with processor and peripherals running at low frequency
– Standby Mode, mix of Idle and Backup Mode, with peripherals running at low
– Backup Mode with Main Power Supplies off, VDDBU powered by a battery
frequency, processor stopped waiting for an interrupt
PLLBCK
MAINCK
PLLACK
AT91SAM9263 Power Management Controller Block Diagram
SLCK
Master Clock Controller
®
/WindowsCE
/1,/2,/4,...,/64
Prescaler
MAINCK
PLLBCK
PLLACK
PLLBCK
SLCK
Programmable Clock Controller
®
compliant tick generator
Divider
/1,/2,/4
USB Clock Controller
AT91SAM9263 Preliminary
Divider
/1,/2,/4
/1,/2,/4,...,/64
Prescaler
ON/OFF
Clock Controller
Processor
Controller
Idle Mode
ON/OFF
Clock
Peripherals
ON/OFF
MCK
PCK
int
periph_clk[..]
pck[..]
UDPCK
UHPCK
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