HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 413

• Manufacturer Part Number: HD64570
• Description: Serial Communications Adaptor
• Manufacturer: HITACHI [Hitachi Semiconductor]

Register
Wait Control
Wait Control Registers M
(WCRM)
Wait Control Registers H
(WCRH)
Not used
DMA Priority Control
Register (PCR)
DMAC (General)
CPU
Mode
0, 1
05H
06H
07H
08H
Address
CPU
Mode
2, 3
04H
07H
06H
09H
Bit name
Read/Write
Initial value
Bit name
Read/Write
Initial value
Single-block
transfer mode
Chained-block
transfer mode
Read/Write
Initial value
Remarks
Bus release condition
0:
1:
—
—
—
—
7
0
7
0
—
No DMA request issued
One DMA transfer performed
by each channel
7
—
0
—
—
—
—
—
6
0
6
0
6
—
0
—
—
—
—
—
5
0
5
0
—
5
0
Rev. 0, 07/98, page 397 of 453
—
—
BRC
R/W
—
—
4
0
4
0
4
0
—
—
CCC
Channel change condition
0:
1:
R/W
—
—
3
0
3
0
3
0
Per bus cycle
No DMA request issued by
the corresponding channel
PAMW2 PAMW1
PAHW2 PAHW1
PR2
R/W
R/W
R/W
2
1
2
1
2
0
Channel priority
PAM area wait
PAH area wait
PR1
R/W
R/W
R/W
1
1
1
1
1
0
PAMW0
PAHW0
PR0
R/W
R/W
R/W
0
1
0
1
0
0