HD64570 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HD64570

Serial Communications Adaptor

Hitachi -> Renesas Electronics 

Register

DMAC (Channel 2)

Byte Count Register

Channel 2: BCRL

Channel 2

Byte Count Register

Channel 2: BCRH

Channel 2

DMA Status Register

Channel 2: DSR

Channel 2

Address

CPU CPU

Mode Mode

0, 1 2, 3 Remarks

CEH CFH

H

L

15

87

0

CFH CEH

Single-block transfer

mode

Chained-block

transfer mode

BCRH

BCRL

D0H

D1H

7

6

5

4

3

2

Single-block

transfer mode

—— —

Chained-block EOT

——

transfer mode

EOM BOF COF

1

0

DE DWE

Read/Write

Initial value

R/W R/W R/W R/W —

0

0

0

0

0

— R/W W

0

0

1

End of transfer

0: Transfer not completed

1: Transfer completed

Counter overflow

• Chained-block

transfer

0: No error detected

1: Error detected

Buffer overflow/underflow

• Chained-block transfer

0: No error detected

1: Error detected

DMA enable

0: Disable

1: Enable

DE bit write enable

0: Enable

1: Disable

End of frame transfer

• Chained-block transfer

0: Frame transfer not completed

1: Frame transfer completed

Rev. 0, 07/98, page 445 of 453

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