User's Manual

S3C2450X RISC MICROPROCESSOR CF CONTROLLER
8-29
2.33 BUS_FIFO_STATUS REGISTER
Register Address R/W Description Reset Value
BUS_FIFO_
STATUS
0x4B801990 R BUS FIFO status register 0x0000_0000
BUS_FIFO_
STATUS
Bits Description R/W Reset Value
Reserved [31:19] Reserved bits R 0x0
bus_state[2:0] [18:16] 3’b000 : IDLE
Another value is in operation.
R 0x00
Reserved [15:14] Reserved bits R 0x0
bus_fifo_rdpnt [13:8] bus fifo read pointer R 0x00
Reserved [7:6] Reserved bits R 0x0
bus_fifo_wrpnt [5:0] bus fifo write pointer R 0x00
2.34 ATA_FIFO_STATUS REGISTER
Register Address R/W Description Reset Value
ATA_FIFO_
STATUS
0x4B801994 R ATA FIFO status register 0x0000_0000
ATA_FIFO_
STATUS
Bits Description R/W Reset Value
Reserved [31] Reserved bit R 0x0
ata_state [30:28] PIO read data register while HOST read from ATA device
register
R 0x0000
pio_state [27:26] 2’b00 = IDLE 2’’b01 = T1
2’b10 = T2 2’b11 = TEOC
R 0x0
pdma_state [25:24] 2’b00 = IDLE 2’b01 = T1
2’b10 = T2 2’b11 = TEOC
R 0x0
Reserved [23:0] Reserved bits R 0x0