Freescale Semiconductor MPC5200B ユーザーズマニュアル
ATA Register Interface
MPC5200B Users Guide, Rev. 1
Freescale Semiconductor
11-5
11.3.1.6
ATA Multiword DMA Timing 2 Register—MBAR + 0x3A14
11.3.1.7
ATA Ultra DMA Timing 1 Register—MBAR + 0x3A18
Bits
Name
Description
0:7
dma_t0
Multiword DMA cycle time. Count value is based on system clock operating frequency.
8:15
dma_td
Multiword DMA read/write (DIOR/DIOW) asserted pulse width. Count value is based on
system clock operating frequency.
system clock operating frequency.
16:23
dma_tk
Multiword DMA read/write (DIOR/DIOW) negated pulse width. Count value is based on
system clock operating frequency.
system clock operating frequency.
24:31
dma_tm
CS[0], CS[1] valid to DIOR/DIOW. Count value is based on system clock operating
frequency.
frequency.
Table 11-6. ATA Multiword DMA Timing 2 Register
msb 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
dma_th
dma_tj
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
dma_tn
Reserved
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bits
Name
Description
0:7
dma_th
Multiword DMA write (DIOW) data hold time. Count value is based on system clock
operating frequency.
operating frequency.
8:15
dma_tj
Multiword DMA read/write (DIOR/DIOW) asserted pulse width. Count value is based on
system clock operating frequency.
system clock operating frequency.
16:23
dma_tn
CS[0], CS[1] hold. Count value is based on system clock operating frequency.
24:31
—
Reserved
Table 11-7. ATA Ultra DMA Timing 1 Register
msb 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
udma_t2cyc
udma_tcyc
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
udma_tds
udma_tdh
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0