SAM3N00A Atmel Corporation, SAM3N00A Datasheet - Page 169

• Manufacturer Part Number: SAM3N00A
• Manufacturer: Atmel Corporation

• RETTOBASE
RO
Indicates whether there are preempted active exceptions:
0 = there are preempted active exceptions to execute
1 = there are no active exceptions, or the currently-executing exception is the only active exception.
• VECTACTIVE
RO
Contains the active exception number:
0 = Thread mode
Nonzero = The exception number
Subtract 16 from this value to obtain the IRQ number required to index into the Interrupt Clear-Enable, Set-Enable, Clear-
Pending, Set-Pending, or Priority Registers, see
When you write to the ICSR, the effect is Unpredictable if you:
Note:
11011A–ATARM–04-Oct-10
• write 1 to the PENDSVSET bit and write 1 to the PENDSVCLR bit
• write 1 to the PENDSTSET bit and write 1 to the PENDSTCLR bit.
1. This is the same value as IPSR bits [8:0] see
(1)
of the currently active exception.
“Interrupt Program Status Register” on page
“Interrupt Program Status Register” on page
48.
48.
SAM3N
169