Nxp Semiconductors UM10237 ユーザーズマニュアル

UM10237_2

© NXP B.V. 2008. All rights reserved.

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Reset Value reflects the data stored in used bits only. It does not include reserved bits content.

The following section describes the VIC registers in the order in which they are used in the 
VIC logic, from those closest to the interrupt request inputs to those most abstracted for 
use by software. For most people, this is also the best order to read about the registers 
when learning the VIC.

The VICSoftInt register is used to generate software interrupts. The contents of this 
register are ORed with the 32 interrupt requests from the various peripherals, before any 
other logic is applied.

 

The VICSoftIntClear register is a ’Write Only’ register. This register allows software to 
clear one or more bits in the Software Interrupt register, without having to first read it.

 

This is a read only register. This register reads out the state of the 32 interrupt requests 
and software interrupts, regardless of enabling or classification.

VICVectPriority26

Vector priority 26 register.

R/W

0xF

0xFFFF F268

VICVectPriority27

Vector priority 27 register.

R/W

0xF

0xFFFF F26C

VICVectPriority28

Vector priority 28 register.

R/W

0xF

0xFFFF F270

VICVectPriority29

Vector priority 29 register.

R/W

0xF

0xFFFF F274

VICVectPriority30

Vector priority 30 register.

R/W

0xF

0xFFFF F278

VICVectPriority31

Vector priority 31 register.

R/W

0xF

0xFFFF F27C

VICAddress

Vector address register. When an IRQ interrupt occurs, the 
Vector Address Register holds the address of the currently 
active interrupt.

R/W

0

0xFFFF FF00

31:0

0

Do not force the interrupt request with this bit number. Writing zeroes to bits 
in VICSoftInt has no effect, see VICSoftIntClear (

).

0

1

Force the interrupt request with this bit number.

31:0

See 

.

0

Writing a 0 leaves the corresponding bit in VICSoftInt unchanged.

0

1

Writing a 1 clears the corresponding bit in the Software Interrupt register, 
removing any interrupt that may have been generated by that bit.