HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 452
HD64570
Manufacturer Part Number
HD64570
Description
Serial Communications Adaptor
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD64570.pdf
(469 pages)
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Register
DMAC (Channel 0)
DMA Mode Register
Channel 0: DMR Channel 0
Not used
Frame End Interrupt
Counter Channel 0: FCT
Channel 0
DMA Interrupt Enable
Register Channel 0: DIR
Channel 0
Rev. 0, 07/98, page 436 of 453
CPU
Mode
0, 1
91H
92H
93H
94H
Address
CPU
Mode
2, 3
90H
93H
92H
95H
Single-block
transfer mode
Chained-block
transfer mode
Read/Write
Initial value
Remarks
Single-block
transfer mode
Chained-block
transfer mode
Read/Write
Initial value
Single-block
transfer mode
Chained-block
transfer mode
Read/Write
Initial value
Transfer end interrupt
enable
0:
1:
DMA transfer mode
0:
1:
Disable
Enable
Single-block transfer
Chained-block transfer
Frame transfer end interrupt
enable
•
0:
1:
Chained-block transfer mode
Disable
Enable
EOTE
R/W
—
—
—
7
0
—
7
0
7
0
EOME BOFE COFE
R/W
—
—
—
—
6
0
—
6
0
6
0
R/W
—
—
—
—
5
0
5
—
0
5
0
Number of DMA frames
•
0:
1:
Frame end interrupt counter (FCT)
enable/disable
•
Set this bit to 0
•
0:
1:
Chained-block transfer
Single frame
Multi-frame
Single-block transfer
Chained-block transfer
Frame end interrupt counter (FCT) disabled
Frame end interrupt counter (FCT) enabled
TMOD
Counter overflow
interrupt enable
•
0:
1:
R/W
—
R/W
—
—
4
0
4
0
Frame end interrupt counter (FCT) value
4
0
Chained-block transfer mode
Disable
Enable
FCT3
—
—
—
R
3
0
3
0
—
—
Buffer overflow/underflow
interrupt enable
•
0:
1:
3
0
Chained-block transfer mode
Disable
Enable
FCT2
R/W
NF
—
R
—
2
0
—
2
0
—
2
0
CNTE
FCT1
R/W
—
R
1
0
1
0
—
—
1
0
FCT0
—
R
—
0
0
—
0
0
—
—
0
0
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