ELANSC520 datasheet(156/440 Pages) AMD

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GP DMA Controller Registers

11-24

Élan™SC520 Microcontroller Register Set Manual

Buffer Chaining Interrupt Enable (GPDMABSINTENB)

Memory-Mapped

MMCR Offset D9Ah

This register provides the interrupt enable bits for the buffer chaining interrupts. An interrupt is generated when the

GP bus DMA controller completes the transfer that is in progress. Software can use this interrupt to queue up a

subsequent transfer.

Bit Definitions

Programming Notes

Before buffer chaining interrupts are enabled, the DMABCINTMAP register (see page 12-21) must be configured to

route the interrupt to the appropriate interrupt request level and priority.

Buffer chaining is enabled separately for each channel in the GPDMABCCTL register (see page 11-21).

Bit

Reserved

CH7_INT_

ENB

CH6_INT_

ENB

CH5_INT_

ENB

CH3_INT_

ENB

Reset

00000000

R/W

RSV

R/W

Bit

Name

Function

–4

Reserved

This bit field should be written to 0 for normal system operation.

CH7_INT_

ENB

Interrupt Enable for Channel 7

This bit is applicable only if the Buffer Chaining feature is enabled for this channel.

0 = End-of-buffer interrupt for this channel is disabled.

1 = End-of-buffer interrupt for this channel is enabled.

CH6_INT_

ENB

Interrupt Enable for Channel 6

This bit is applicable only if the Buffer Chaining feature is enabled for this channel.

0 = End-of-buffer interrupt for this channel is disabled.

1 = End-of-buffer interrupt for this channel is enabled.

CH5_INT_

ENB

Interrupt Enable for Channel 5

This bit is applicable only if the Buffer Chaining feature is enabled for this channel.

0 = End-of-buffer interrupt for this channel is disabled.

1 = End-of-buffer interrupt for this channel is enabled.

CH3_INT_

ENB

Interrupt Enable for Channel 3

This bit is applicable only if the Buffer Chaining feature is enabled for this channel.

0 = End-of-buffer interrupt for this channel is disabled.

1 = End-of-buffer interrupt for this channel is enabled.

ELANSC520 Datasheet(PDF) 156 Page - Advanced Micro Devices

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