Raven Interrupt Controller

External Source Vector/Priority Registers

Offset

 

 

 

 

 

 

 

 

 

 

 

 

 

Int Src 0 - $10000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Int Src 2 -> Int Src15 - $10020 -> $101E0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

3

3

2

2

2

 

2

2

2

2

2

2

2

1

1

1

 

1

1

1

1

 

1

 

1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

1

0

9

8

7

 

6

5

4

3

2

1

0

9

8

7

 

6

5

4

3

 

2

 

1

0

9

 

8

7

6

5

4

3

2

 

1

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Name

 

 

 

 

 

 

 

 

EXTERNAL SOURCE VECTOR/PRIORITY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MASK

ACT

 

 

 

 

 

 

 

POL

SENSE

 

 

PRIOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VECTOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operation

R/W

R

 

 

R

 

 

 

R/W

R/W

R

R

 

R/W

 

 

 

 

 

R

 

 

 

 

 

 

 

 

R/W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset

1

0

 

 

$000

 

 

0

0

0

0

 

$0

 

 

 

 

 

 

$00

 

 

 

 

 

 

 

$00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MASK

 

Mask. Setting this bit disables any further interrupts from

 

 

 

 

 

 

 

 

 

 

this source. If the mask bit is cleared while the bit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

associated with this interrupt is set in the IPR, the interrupt

 

 

 

 

 

 

 

 

 

 

request will be generated.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ACT

 

 

Activity. The activity bit indicates that an interrupt has

 

 

 

 

 

 

 

 

 

 

 

been requested or that it is in-service. The ACT bit is set

 

 

 

 

 

 

 

 

 

 

to a 1 when its associated bit in the Interrupt Pending

 

 

 

 

 

 

 

 

 

 

 

 

register or In-Service register is set.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POL

 

 

Polarity. This bit sets the polarity for external interrupts.

 

 

 

 

 

 

 

 

 

 

Setting this bit to a 0 enables active low or negative edge.

 

 

 

 

 

 

 

 

 

 

Setting this bit to a 1 enables active high or positive edge.

 

 

 

 

 

 

 

 

 

 

Only External Interrupt Source 0 uses this bit in this

 

 

 

 

 

 

 

 

 

 

 

 

register.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SENSE

 

Sense. This bit sets the sense for external interrupts.

 

 

 

 

 

 

 

 

 

 

 

 

Setting this bit to a zero enables edge-sensitive interrupts.

Setting this bit to a one enables level-sensitive interrupts. For external interrupt sources 1 through 15, setting this bit to a 0 enables positive edge-triggered interrupts. Setting this bit to a one enables active-low level-triggered interrupts.

2

http://www.motorola.com/computer/literature

2-81

Page 151
Image 151
Motorola MVME2300 Series manual External Source Vector/Priority Registers, Pol, Sense