LM4560 datasheet(44/54 Pages) NSC

44 / 54 page

4.0 Functional Description (Continued)

4.2.1.13 8/16-Bit Audio Dma Operation Control Command Dxh

4.2.1.13.1 Command D0h

Function: Pause Non-Bx Type Command DMA Transfer

The DMA request is stopped after this command. Internal FIFO will continue running until the FIFO is empty (playback) or full

(record). The DMA request will resume after command D4h or any of new DMA command is captured by SB ESP. This command

is no use to Bx type command DMA transfer.

4.2.1.13.2 Command D1h

Function: Set Digital Audio On Status Flag for D8 Command

4.2.1.13.3 Command D3h

Function: Set Digital Audio Off Status Flag for D8 Command

Digital audio status flag is off after system reset or SB ESP_Reset().

4.2.1.13.4 Command D4h

Function: Resume Non-Bx Type Command DMA Transfer

The DMA request that is suspended by the command D0h is enabled again. The internal FIFO is working as usual. This command

is no use to Bx type command DMA transfer.

4.2.1.13.5 Command D5h

Function: Pause Bx Type Command DMA Transfer

The DMA request is stopped after this command. Internal FIFO will continue running until the FIFO is empty (playback) or full

(record). The DMA request will resume after command D6h or any of new DMA command is captured by SB ESP. This command

is no use to non-Bx type command DMA transfer.

4.2.1.13.6 Command D6h

Function: Resume Bx Type Command DMA Transfer

The DMA request that is suspended by the command D5h is enabled again. The internal FIFO is working as usual. This command

is no use to non-Bx type command DMA transfer.

4.2.1.13.7 Command D8h

Function: Get Digital Audio Status Flag

4.2.1.13.8 Command D9h

Function: Exit Current Bx Type Command Continuous DMA Transfer

Causes the SB ESP to finish the current block, then cease transferring. Use this command while the DMA is transferring the last

block of audio data from/to the SB ESP. SB ESP-Reset() or any of new DMA command should reset this flag.

4.2.1.13.9 Command DAh

Function: Exit Current Non-Bx Type Command Continuous DMA Transfer

Causes the SB ESP to finish the current block, then cease transferring. Use this command while the DMA is transferring the last

block of audio data from/to the SB ESP. SB ESP-Reset() or any of new DMA command should reset this flag.

4.2.1.14 SB ESP Version and Diagnostic Command Exh

4.2.1.14.1 Command E0h

Function: SB ESP Read/Write Diagnostic Test

4.2.1.14.2 Command E1h

Function: Get SB ESP Version Number

SB PRO Version 3.02

SB16 Version 4.02

Major Version = ASR5 (Default 04h)

Minor Version = ASR6 (Default 02h)

4.2.1.14.3 Command E2h

Function: DMA testing

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