Preliminary
S3C2451X RISC MICROPROCESSOR
CF CONTROLLER
8-21
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
ATA_CFG Bits
Description
R/W
Reset
Value
byte_swap [6]
Determines
whether
data endian is little or big in 16bit
data.
0 : little endian ( data[15:8], data[7:0] )
1 : big endian ( data[7:0], data[15:8] )
R/W 0x0
atadev_irq_al
[5]
Device interrupt signal level
0: active high 1: active low
R/W 0x0
dma_dir
[4]
DMA transfer direction
0 : Host read data from device 1 : Host write data to
device
R/W 0x0
ata_class
[3:2]
ATA transfer class select
0 : transfer class is PIO
1 : transfer class is PIO DMA
2,3 : reserved
R/W 0x0
ata_iordy_en [1]
Determines
whether IORDY input can extend data
transfer.
0 : IORDY disable( ignored )
1 : IORDY enable ( can extend )
R/W 0x0
ata_rst
[0]
ATA device reset by this host.
0 : no reset 1 : reset
R/W 0x0
