SST55LD019M datasheet(29/59 Pages) SST

29 / 59 page

Advance Information

ATA Flash Disk Controller

SST55LD019M

S71312-01-000

12/06

10.2.1.5.20 Word 63: Multi-word DMA Transfer Mode

This field identifies the multi-word DMA transfer modes supported by the ATA Flash Disk Controller and

indicates the mode that is currently selected. Only one DMA mode can be selected at any given time.

Bit

Function

15-11

Reserved

Multi-word DMA mode 2 selected

1: Multi-word DMA mode 2 is selected and bits 8 and 9 are cleared to 0

0: Multi-word DMA mode 2 is not selected.

Multi-word DMA mode 1 selected

1: Multi-word DMA mode 1 is selected and 8 and 10 should be cleared to 0.

0: Multi-word DMA mode 1 is not selected.

Multi-word DMA mode 0 selected

1: Multi-word DMA mode 0 is selected and bits 9 and 10 are cleared to 0.

0: Multi-word DMA mode 0 is not selected.

7-3

Reserved

Multi-word DMA mode 2 supported

1: Multi-word DMA mode 2 and below are supported and Bits 0 and 1 are set to 1.

Multi-word DMA mode 1 supported

1: Multi-word DMA mode 1 and below are supported.

Multi-word DMA mode 0 supported

1: Multi-word DMA mode 0 is supported.

10.2.1.5.21 Word 64: Advanced PIO Data Transfer Mode

Bit

Function

1: ATA Flash Disk Controller supports PIO Mode-3.

1: ATA Flash Disk Controller supports PIO Mode-4.

10.2.1.5.22 Word 65: Minimum Multi-word DMA Transfer Cycle Time Per Word

This field defines the minimum Multi-word DMA transfer cycle time per word. This field defines, in

nanoseconds, the minimum cycle time that the ATA Flash Disk Controller supports when performing

Multi-word DMA transfers on a per word basis. SST’s ATA Flash Disk Controller supports up to Multi-

word DMA Mode-2, so this field is set to 120ns.

SST55LD019M Datasheet(PDF) 29 Page - Silicon Storage Technology, Inc