HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 451

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

Register
DMAC (Channel 0)
Byte Count Register
Channel 0: BCRL
Channel 0
Byte Count Register
Channel 0: BCRH
Channel 0
DMA Status Register
Channel 0: DSR Channel 0
CPU
Mode
0, 1
8EH
8FH
90H
Address
CPU
Mode
2, 3
8FH
8EH
91H
Single-block
transfer mode
Chained-block
transfer mode
Read/Write
Initial value
End of transfer
0:
1:
Remarks
Transfer not completed
Transfer completed
Single-block transfer
mode
Chained-block
transfer mode
EOT
R/W
7
0
End of frame transfer
•
0:
1:
Chained-block transfer
Frame transfer not completed
Frame transfer completed
EOM
R/W
—
6
0
15
Buffer overflow/underflow
•
0:
1:
BOF
R/W
—
Chained-block transfer
No error detected
Error detected
5
0
Counter overflow
•
0:
1:
Rev. 0, 07/98, page 435 of 453
BCRH
Chained-block
transfer
No error detected
Error detected
R/W
—
COF
H
4
0
—
—
3
0
8 7
—
—
2
0
DMA enable
0:
1:
BCRL
Disable
Enable
R/W
DE bit write enable
0:
1:
DE
L
1
0
Enable
Disable
DWE
W
0
1
0