HD6417751 Datasheet, PDF (900/1105 Pages) Renesas Technology Corp – SuperH RISC engine

The transfer address of a byte boundary or character boundary can be set, but the 2 least
significant bits of the register are ignored, and the data of the longword boundary is transferred.
Note that the local bus starting address set in this register is the external address of the SH.
Always write to this register prior to starting DMA transfers. After a DMA transfer starts, the
register value is not retained. Always re-set this register before starting a new DMA transfer after
a DMA transfer has completed.
Bits 31 to 29—Reserved: These bits always return 0 when read. Always write 0 to these bits.
Bits 28 to 0—DMA Transfer Local Bus Starting Address (PDLA28 to 0): These bits set the
starting address of the local bus (external address of SH) for DMA transfer. Bits 28 to 26 indicate
the local bus area.
22.2.30 PCI DMA Transfer Counter Register [3:0] (PCIDTC [3:0])
Bit: 31
30
29
28
27
26
—
—
—
—
—
—
Initial value: 0
0
0
0
0
0
PCI-R/W: R
R
R
R
R
R
PP Bus-R/W: R
R
R
R
R
R
25
PTC25
0
R/W
R/W
24
PTC24
0
R/W
R/W
Bit:
Initial value:
PCI-R/W:
PP Bus-R/W:
23
PTC23
0
R/W
R/W
22
PTC22
0
R/W
R/W
21
PTC21
0
R/W
R/W
20
PTC20
0
R/W
R/W
19
PTC19
0
R/W
R/W
18
PTC18
0
R/W
R/W
17
PTC17
0
R/W
R/W
16
PTC16
0
R/W
R/W
Bit:
Initial value:
PCI-R/W:
PP Bus-R/W:
15
PTC15
0
R/W
R/W
14
PTC14
0
R/W
R/W
13
PTC13
0
R/W
R/W
12
PTC12
0
R/W
R/W
11
PTC11
0
R/W
R/W
10
PTC10
0
R/W
R/W
9
PTC9
0
R/W
R/W
8
PTC8
0
R/W
R/W
Bit:
Initial value:
PCI-R/W:
PP Bus-R/W:
7
PTC7
0
R/W
R/W
6
PTC6
0
R/W
R/W
5
PTC5
0
R/W
R/W
4
PTC4
0
R/W
R/W
3
PTC3
0
R/W
R/W
2
PTC2
0
R/W
R/W
1
PTC1
0
R/W
R/W
0
PTC0
0
R/W
R/W
Rev. 3.0, 04/02, page 860 of 1064