Freescale Semiconductor MPC5200B ユーザーズマニュアル
ATA Register Interface
MPC5200B Users Guide, Rev. 1
Freescale Semiconductor
11-13
11.3.3.2
ATA Drive Alternate Status Register—MBAR + 0x3A5C
11.3.3.3
ATA Drive Data Register—MBAR + 0x3A60
Table 11-20. ATA Drive Alternate Status Register
msb 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
BSY
DRDY
Reserved
DRQ
Rsvd
ERR
Reserved
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 lsb
R
Reserved
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bits
Name
Description
0
BSY
Drive Busy—Transactions internal to drive are in progress. Host must wait.
1
DRDY
Drive Ready
2:3
—
Reserved
4
DRQ
Set to 1 indicates drive is ready to transfer a word of data.
5:6
—
Reserved
7
ERR
Indicates an error during the execution of the previous command.
8:31
—
Reserved
Table 11-21. ATA Drive Data Register
msb 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
Data H
Data L
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 lsb
R
Reserved
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bits
Name
Description
0:7
Data H
Upper byte of drive data (read/write)
8:15
Data L
Lower byte of drive data (read/write)
16:31
—
Reserved