OM11027 NXP Semiconductors, OM11027 Datasheet - Page 62

• Manufacturer Part Number: OM11027
• Description: BOARD EVAL LPC2939
• Manufacturer: NXP Semiconductors
• Type: MCUr

Specifications of OM11027

• Contents: Board
• For Use With/related Products: LPC2939
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-4787

NXP Semiconductors
LPC2939_3
Product data sheet
6.17.1 Functional description
6.17.2 Clock description
The Vectored Interrupt Controller routes incoming interrupt requests to the ARM
processor. The interrupt target is configured for each interrupt request input of the VIC.
The targets are defined as follows:
Interrupt-request masking is performed individually per interrupt target by comparing the
priority level assigned to a specific interrupt request with a target-specific priority
threshold. The priority levels are defined as follows:
Software interrupt support is provided and can be supplied for:
The VIC is clocked by CLK_SYS_VIC, see
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Target 0 is ARM processor FIQ (fast interrupt service)
Target 1 is ARM processor IRQ (standard interrupt service)
Priority level 0 corresponds to ‘masked’ (i.e. interrupt requests with priority 0 never
lead to an interrupt)
Priority 1 corresponds to the lowest priority
Priority 15 corresponds to the highest priority
Testing RTOS (Real-Time Operating System) interrupt handling without using
device-specific interrupt service routines
Software emulation of an interrupt-requesting device, including interrupts
All information provided in this document is subject to legal disclaimers.
Rev. 03 — 7 April 2010
ARM9 microcontroller with CAN, LIN, and USB
Section
6.7.2.
LPC2939
© NXP B.V. 2010. All rights reserved.
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