ARM Cortex-M3 User Manual

Nested Vectored Interrupt Controller
ARM DDI 0337G Copyright © 2005-2008 ARM Limited. All rights reserved. 8-15
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Interrupt Set-Pending Register
Use the Interrupt Set-Pending Register to:
• force interrupts into the pending state
• determine which interrupts are currently pending.
Each bit in the register corresponds to one of the 32 interrupts. Setting an Interrupt
Set-Pending Register bit pends the corresponding interrupt.
Clear an Interrupt Set-Pending Register bit by writing a 1 to the corresponding bit in the
Interrupt Clear-Pending Register (see Interrupt Clear-Pending Register). Clearing the
Interrupt Set-Pending Register bit puts the interrupt into the non-pended state.
Note
Writing to the Interrupt Set-Pending Register has no affect on an interrupt that is already
pending or is disabled.
The register address, access type, and Reset state are:
Address
0xE000E200 - 0xE000E21C
Access Read/write
Reset state
0x00000000
Table 8-10 describes the field of the Interrupt Set-Pending Register.
Interrupt Clear-Pending Register
Use the Interrupt Clear-Pending Register to:
• clear pending interrupts
• determine which interrupts are currently pending.
Each bit in the register corresponds to one of the 32 interrupts. Setting an Interrupt
Clear-Pending Register bit puts the corresponding pending interrupt in the inactive
state.
Table 8-10 Interrupt Set-Pending Register bit assignments
Bits Field Function
[31:0] SETPEND Interrupt set-pending bits:
1 = pend the corresponding interrupt
0 = corresponding interrupt not pending.
Writing 0 to a SETPEND bit has no effect. Reading the bit returns its current state.

ARM Cortex-M3 Specifications

General

Architecture	ARMv7-M
Instruction Set	Thumb-2
Pipeline Stages	3-stage
Interrupts	Nested Vectored Interrupt Controller (NVIC)
Interrupt Controller	Nested Vectored Interrupt Controller (NVIC)
Memory Protection Unit	Optional
Power Consumption	Varies by implementation
Max Clock Speed	Up to 100 MHz
Debugging	JTAG and Serial Wire Debug (SWD)
Operating Voltage	1.8V to 3.6V
Manufacturing Process	Varies by implementation
Core Type	32-bit