Z8018933FSC View Datasheet(PDF) - Zilog

Part Name

Description

Manufacturer

Z8018933FSC

GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog 

Zilog

DMA REGISTERS

SAR0L

Read/Write

SA7

Addr 20H

SA0

PRELIMINARY

Z80189/Z8L189

GENERAL-PURPOSE EMBEDDED CONTROLLERS

BCR0L

Read/Write

BC7

Addr 26H

BC0

SAR0H

Read/Write

SA15

Addr 21H

SA8

SAR0B

Read/Write

Addr 22H

SA19 SA16

- ---

Bits 0-2 (3) are used for SAR0B

A19, A18, A17, A16 DMA Transfer Request

xx

xx

xx

xx

0 0 ext (CKA0//DREQ0

0 1 ASCI0 Rx

1 0 ASCI1 Rx

1 1 ext (/DREQ1)

Figure 58. DMA 0 Source Address Registers

DAR0L

Read/Write

DA7

Addr 23H

DA0

DAR0H

Read/Write

DA15

Addr 24H

DA8

BCR0H

Read/Write

BC15

Addr 27H

BC8

Figure 60. DMA 0 Byte Counter Registers

MAR1L

Read/Write

MA7

Addr 28H

MA0

MAR1H

Read/Write

MA15

Addr 29H

MA8

MAR1B

Read/Write

Addr 2AH

MA19 MA16

----

Figure 61. DMA 1 Memory Address Registers

DAR0B

Read/Write

Addr 25H

DA19 DA16

- - --

Bits 0-2 (3) are used for DAR0B

A19, A18, A17, A16 DMA Transfer Request

x x 0 0 ext (CKA0//DREQ0)

x x 0 1 ASCI0 Tx

x x 1 0 ASCI1 Tx

x x 1 1 ext (/DREQ1)

Figure 59. DMA 0 Destination Address Registers

54

DS971890301

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